Herbicidal compounds

1. A compound of formula (I):

or an agrochemically acceptable salt thereof wherein:

R 1 is selected from the group consisting of methyl, ethyl, n-propyl, cyclopropyl, trifluoromethyl, vinyl, ethynyl, fluorine, chlorine, bromine, methoxy, ethoxy and fluoromethoxy;

R 2 is selected from the group consisting of hydrogen, methyl, ethyl, n-propyl, isopropyl, cyclopropyl, fluoromethyl, fluoroethyl, vinyl, prop-1-enyl, ethynyl, prop-1-ynyl, 2-chloroethynyl, 2-fluoroethynyl, 2-(trifluoromethyl)ethynyl, but-1-ynyl, 2-(cyclopropyl)ethynyl, halogen, methoxy, prop-2-ynyloxy, and (C 1 -C 2 fluoroalkyl)-methoxy-; or

R 2 is phenyl optionally substituted by 1, 2 or 3 of, independently, halogen, C 1 -C 2 alkyl, C 1 -C 2 fluoroalkyl, C 1 -C 2 alkoxy, C 1 -C 2 fluoroalkoxy, cyano or nitro; or

R 2 is monocyclic heteroaryl optionally substituted by 1, 2 or 3 of, independently, halogen, C 1 -C 2 alkyl, C 1 -C 2 fluoroalkyl, C 1 -C 2 alkoxy, C 1 -C 2 fluoroalkoxy, cyano or nitro; and

R 3 is selected from the group consisting of hydrogen, methyl, ethyl, n-propyl, cyclopropyl, trifluoromethyl, vinyl, ethynyl, fluorine, chlorine, bromine, methoxy, ethoxy, n-propoxy, isopropoxy, C 1 -C 2 fluoroalkoxy, C 1 -C 2 alkoxy-C 1 -C 3 alkoxy- and C 1 fluoroalkoxy-C 1 -C 3 alkoxy-;

R 4 , R 5 and R 6 are independently of each other, selected from the group consisting of hydrogen, C 1 -C 5 alkyl, C 2 -C 3 alkenyl, C 2 -C 3 alkynyl, C 1 -C 2 fluoroalkyl and C 1 -C 2 alkoxyC 1 -C 2 alkyl;

R 7 and R 8 are independently of each other, selected from the group consisting of hydrogen, fluorine and C 1 -C 3 alkyl;

R 9 and R 19 are independently of each other, selected from the group consisting of hydrogen, fluorine and C 1 -C 3 alkyl;

R 11 is —(C═O)-5,5-dimethyl-4H-isoxazol-2-yl,

R 12 is selected from the group consisting of hydrogen, C 1 -C 6 alkyl, C 1 -C 6 alkoxy and hydroxy;

and wherein:

G is hydrogen; an agriculturally acceptable metal, or an agriculturally acceptable sulfonium or ammonium group; or

G is —C(X a )—R a , —C(X b )—X c —R b , —C(X d )—N(R c )—R d , —SO 2 —R e , —P(X e )(R f )—R 9 , —CH 2 —X f —R h , or —CH(Me)-X f —R h ; or phenyl-CH 2 — or phenyl-CH(C 1 -C 2 alkyl)- (in each of which the phenyl is optionally substituted by 1, 2 or 3 of, independently, C 1 -C 2 alkyl, C 1 fluoroalkyl, C 1 -C 2 alkoxy, C 1 fluoroalkoxy, fluorine, chlorine, bromine, cyano or nitro), or heteroaryl-CH 2 — or heteroaryl-CH(C 1 -C 2 alkyl)- (in each of which the heteroaryl is optionally substituted by 1, 2 or 3 of, independently, C 1 -C 2 alkyl, C 1 fluoroalkyl, C 1 -C 2 alkoxy, C 1 fluoroalkoxy, fluorine, chlorine, bromine, cyano or nitro), or phenyl-C(O)—CH 2 — (wherein the phenyl is optionally substituted by 1, 2 or 3 of, independently, C 1 -C 2 alkyl, C 1 fluoroalkyl, C 1 -C 2 alkoxy, C 1 fluoroalkoxy, fluorine, chlorine, bromine, cyano or nitro); or C 1 -C 6 alkoxy-C(O)—CH 2 —, C 1 -C 6 alkyl-C(O)—CH 2 —, C 1 -C 6 alkoxy-C(O)—CH═CH—, C 2 -C 7 alken-1-yl-CH 2 —, C 2 -C 7 alken-1-yl-CH(C 1 -C 2 alkyl)-, C 2 -C 4 fluoroalken-1-yl-CH 2 —, C 2 -C 7 alkyn-1-yl-CH 2 —, or C 2 -C 7 alkyn-1-yl-CH(C 1 -C 2 alkyl)-;

wherein X a , X b , X d , X e and X f are independently of each other oxygen or sulfur; and wherein

R a is H, C 1 -C 21 alkyl, C 2 -C 21 alkenyl, C 2 -C 18 alkynyl, C 1 -C 10 fluoroalkyl, C 1 -C 10 cyanoalkyl, C 1 -C 10 nitroalkyl, C 1 -C 10 aminoalkyl, C 1 -C 5 alkylamino(C 1 -C 5 )alkyl, C 2 -C 8 dialkylamino(C 1 -C 5 )alkyl, C 3 -C 7 cycloalkyl(C 1 -C 5 )alkyl, C 1 -C 5 alkoxy(C 1 -C 5 )alkyl, C 3 -C 5 alkenyloxy(C 1 -C 5 )alkyl, C 3 -C 5 alkynyloxy(C 1 -C 5 )alkyl, C 1 -C 5 alkylthio(C 1 -C 5 )alkyl, C 1 -C 5 alkylsulfinyl(C 1 -C 5 )alkyl, C 1 -C 5 alkylsulfonyl(C 1 -C 5 )alkyl, C 2 -C 8 alkylideneaminoxy(C 1 -C 5 )alkyl, C 1 -C 5 alkylcarbonyl(C 1 -C 5 )alkyl, C 1 -C 5 alkoxycarbonyl(C 1 -C 5 )alkyl, aminocarbonyl(C 1 -C 5 )alkyl, C 1 -C 5 alkylaminocarbonyl(C 1 -C 5 )alkyl, C 2 -C 8 dialkylaminocarbonyl(C 1 -C 5 )alkyl, C 1 -C 5 alkylcarbonylamino(C 1 -C 5 )alkyl, N—(C 1 -C 5 )alkylcarbonyl-N—(C 1 -C 5 )alkylamino(C 1 -C 5 )alkyl, C 3 -C 6 trialkylsilyl(C 1 -C 5 )alkyl, phenyl(C 1 -C 5 )alkyl (wherein the phenyl is optionally substituted by 1, 2 or 3 of, independently, C 1 -C 3 alkyl, C 1 -C 3 fluoroalkyl, C 1 -C 3 alkoxy, C 1 -C 3 fluoroalkoxy, C 1 -C 3 alkylthio, C 1 -C 3 alkylsulfinyl, C 1 -C 3 alkylsulfonyl, halogen, cyano, or nitro), heteroaryl(C 1 -C 5 )alkyl (wherein the heteroaryl is optionally substituted by 1, 2 or 3 of, independently, C 1 -C 3 alkyl, C 1 -C 3 fluoroalkyl, C 1 -C 3 alkoxy, C 1 -C 3 fluoroalkoxy, C 1 -C 3 alkylthio, C 1 -C 3 alkylsulfonyl, halogen, cyano, or nitro), C 2 -C 5 fluoroalkenyl, C 3 -C 8 cycloalkyl; phenyl or phenyl substituted by 1, 2 or 3 of, independently, C 1 -C 3 alkyl, C 1 -C 3 fluoroalkyl, C 1 -C 3 alkoxy, C 1 -C 3 fluoroalkoxy, halogen, cyano or nitro; or heteroaryl or heteroaryl substituted by 1, 2 or 3 of, independently, C 1 -C 3 alkyl, C 1 -C 3 fluoroalkyl, C 1 -C 3 alkoxy, C 1 -C 3 fluoroalkoxy, halogen, cyano or nitro;

R b is C 1 -C 18 alkyl, C 3 -C 18 alkenyl, C 3 -C 18 alkynyl, C 2 -C 10 fluoroalkyl, C 1 -C 10 cyanoalkyl, C 1 -C 10 nitroalkyl, C 2 -C 10 aminoalkyl, C 1 -C 5 alkylamino(C 1 -C 5 )alkyl, C 2 -C 8 dialkylamino(C 1 -C 5 )alkyl, C 3 -C 7 cycloalkyl(C 1 -C 5 )alkyl, C 1 -C 5 alkoxy(C 1 -C 5 )alkyl, C 3 -C 5 alkenyloxy(C 1 -C 5 )alkyl, C 3 -C 5 alkynyloxy(C 1 -C 5 )alkyl, C 1 -C 5 alkylthio(C 1 -C 5 )alkyl, C 1 -C 5 alkylsulfinyl(C 1 -C 5 )alkyl, C 1 -C 5 alkylsulfonyl(C 1 -C 5 )alkyl, C 2 -C 8 alkylideneaminoxy(C 1 -C 5 )alkyl, C 1 -C 5 alkylcarbonyl(C 1 -C 5 )alkyl, C 1 -C 5 alkoxycarbonyl(C 1 -C 5 )alkyl, aminocarbonyl(C 1 -C 5 )alkyl, C 1 -C 5 alkylaminocarbonyl(C 1 -C 5 )alkyl, C 2 -C 8 dialkylaminocarbonyl(C 1 -C 5 )alkyl, C 1 -C 5 alkylcarbonylamino(C 1 -C 5 )alkyl, N—(C 1 -C 5 )alkylcarbonyl-N—(C 1 -C 5 )alkylamino(C 1 -C 5 )alkyl, C 3 -C 6 trialkylsilyl(C 1 -C 5 )alkyl, phenyl(C 1 -C 5 )alkyl (wherein the phenyl is optionally substituted by 1, 2 or 3 of, independently, C 1 -C 3 alkyl, C 1 -C 3 fluoroalkyl, C 1 -C 3 alkoxy, C 1 -C 3 fluoroalkoxy, C 1 -C 3 alkylthio, C 1 -C 3 alkylsulfinyl, C 1 -C 3 alkylsulfonyl, halogen, cyano, or nitro), heteroarylC 1 -C 5 alkyl (wherein the heteroaryl is optionally substituted by 1, 2 or 3 of, independently, C 1 -C 3 alkyl, C 1 -C 3 fluoroalkyl, C 1 -C 3 alkoxy, C 1 -C 3 fluoroalkoxy, C 1 -C 3 alkyl-thio, C 1 -C 3 alkylsulfinyl, C 1 -C 3 alkylsulfonyl, halogen, cyano, or nitro), C 3 -C 5 fluoroalkenyl, C 3 -C 8 cycloalkyl; phenyl or phenyl substituted by 1, 2 or 3 of, independently, C 1 -C 3 alkyl, C 1 -C 3 fluoroalkyl, C 1 -C 3 alkoxy, C 1 -C 3 fluoroalkoxy, halogen, cyano or nitro; or heteroaryl or heteroaryl substituted by 1, 2 or 3 of, independently, C 1 -C 3 alkyl, C 1 -C 3 fluoroalkyl, C 1 -C 3 alkoxy, C 1 -C 3 fluoroalkoxy, halogen, cyano or nitro; and

R c and R d are each independently of each other hydrogen, C 1 -C 10 alkyl, C 3 -C 10 alkenyl, C 3 -C 10 alkynyl, C 2 -C 10 fluoroalkyl, C 1 -C 10 cyanoalkyl, C 1 -C 10 nitroalkyl, C 1 -C 10 aminoalkyl, C 1 -C 5 alkylamino(C 1 -C 5 )alkyl, C 2 -C 8 dialkylamino(C 1 -C 5 )alkyl, C 3 -C 7 cycloalkyl(C 1 -C 5 )alkyl, C 1 -C 5 alkoxy(C 1 -C 5 )alkyl, C 3 -C 5 alkenyloxy(C 1 -C 5 )alkyl, C 3 -C 5 alkynyloxy(C 1 -C 5 )alkyl, C 1 -C 5 alkylthio(C 1 -C 5 )alkyl, C 1 -C 5 alkylsulfinyl(C 1 -C 5 )alkyl, C 1 -C 5 alkylsulfonyl(C 1 -C 5 )alkyl, C 2 -C 8 alkylideneaminoxy(C 1 -C 5 )alkyl, C 1 -C 5 alkylcarbonyl(C 1 -C 5 )alkyl, C 1 -C 5 alkoxycarbonyl(C 1 -C 5 )alkyl, aminocarbonyl(C 1 -C 5 )alkyl, C 1 -C 5 alkylaminocarbonyl(C 1 -C 5 )alkyl, C 2 -C 8 dialkylaminocarbonyl(C 1 -C 5 )alkyl, C 1 -C 5 alkylcarbonylamino(C 1 -C 5 )alkyl, N—(C 1 -C 5 )alkylcarbonyl-N—(C 2 -C 5 )alkylaminoalkyl, C 3 -C 6 trialkylsilyl(C 1 -C 5 )alkyl, phenyl(C 1 -C 5 )alkyl (wherein the phenyl is optionally substituted by 1, 2 or 3 of, independently, C 1 -C 3 alkyl, C 1 -C 3 fluoroalkyl, C 1 -C 3 alkoxy, C 1 -C 3 fluoroalkoxy, C 1 -C 3 alkylthio, C 1 -C 3 alkylsulfinyl, C 1 -C 3 alkylsulfonyl, halogen, cyano, or nitro), heteroaryl(C 1 -C 5 )alkyl (wherein the heteroaryl is optionally substituted by 1, 2 or 3 of, independently, C 1 -C 3 alkyl, C 1 -C 3 fluoroalkyl, C 1 -C 3 alkoxy, C 1 -C 3 fluoroalkoxy, C 1 -C 3 alkylthio, C 1 -C 3 alkylsulfinyl, C 1 -C 3 alkylsulfonyl, halogen, cyano, or nitro), C 2 -C 5 fluoroalkenyl, C 3 -C 8 cycloalkyl; phenyl or phenyl substituted by 1, 2 or 3 of, independently, C 1 -C 3 alkyl, C 1 -C 3 fluoroalkyl, C 1 -C 3 alkoxy, C 1 -C 3 fluoroalkoxy, halogen, cyano or nitro; heteroaryl or heteroaryl substituted by 1, 2 or 3 of, independently, C 1 -C 3 alkyl, C 1 -C 3 fluoroalkyl, C 1 -C 3 alkoxy, C 1 -C 3 fluoroalkoxy, halogen, cyano or nitro; heteroarylamino or heteroarylamino substituted by 1, 2 or 3 of, independently, C 1 -C 3 alkyl, C 1 -C 3 fluoroalkyl, C 1 -C 3 alkoxy, C 1 -C 3 fluoroalkoxy, halogen, cyano or nitro; diheteroarylamino or diheteroarylamino substituted by 1, 2 or 3 of, independently, C 1 -C 3 alkyl, C 1 -C 3 fluoroalkyl, C 1 -C 3 alkoxy, C 1 -C 3 fluoroalkoxy, halogen, cyano or nitro; phenylamino or phenylamino substituted by 1, 2 or 3 of, independently, C 1 -C 3 alkyl, C 1 -C 3 fluoroalkyl, C 1 -C 3 alkoxy, C 1 -C 3 fluoroalkoxy, halogen, cyano or by nitro; diphenylamino or diphenylamino substituted by 1, 2 or 3 of, independently, C 1 -C 3 alkyl, C 1 -C 3 fluoroalkyl, C 1 -C 3 alkoxy, C 1 -C 3 fluoroalkoxy, halogen, cyano or nitro; or C 3 -C 7 cycloalkylamino, di(C 3 -C 7 cycloalkyl)amino or C 3 -C 7 cycloalkoxy;

or R c and R d , together with the nitrogen to which they are bonded, form an unsubstituted 4, 5, 6 or 7 membered ring, optionally containing one heteroatom selected from O or S; and

R e is C 1 -C 10 alkyl, C 2 -C 10 alkenyl, C 2 -C 10 alkynyl, C 1 -C 10 fluoroalkyl, C 1 -C 10 cyanoalkyl, C 1 -C 10 nitroalkyl, C 1 -C 10 aminoalkyl, C 1 -C 5 alkylamino(C 1 -C 5 )alkyl, C 2 -C 8 dialkylamino(C 1 -C 5 )alkyl, C 3 -C 7 cycloalkyl(C 1 -C 5 )alkyl, C 1 -C 5 alkoxy(C 1 -C 5 )alkyl, C 3 -C 5 alkenyloxy(C 1 -C 5 )alkyl, C 3 -C 5 alkynyloxy(C 1 -C 5 )alkyl, C 1 -C 5 alkylthio(C 1 -C 5 )alkyl, C 1 -C 5 alkylsulfinyl(C 1 -C 5 )alkyl, C 1 -C 5 alkylsulfonyl(C 1 -C 5 )alkyl, C 2 -C 8 alkylideneaminoxy(C 1 -C 5 )alkyl, C 1 -C 5 alkylcarbonyl(C 1 -C 5 )alkyl, C 1 -C 5 alkoxycarbonyl(C 1 -C 5 )alkyl, aminocarbonyl(C 1 -C 5 )alkyl, C 1 -C 5 alkylaminocarbonyl(C 1 -C 5 )alkyl, C 2 -C 8 dialkylaminocarbonyl(C 1 -C 5 )alkyl, C 1 -C 5 alkylcarbonylamino(C 1 -C 5 )alkyl, N—(C 1 -C 5 )alkylcarbonyl-N—(C 1 -C 5 )alkylamino(C 1 -C 5 )alkyl, C 3 -C 6 trialkylsilyl(C 1 -C 5 )alkyl, phenyl(C 1 -C 5 )alkyl (wherein the phenyl is optionally substituted by 1, 2 or 3 of, independently, C 1 -C 3 alkyl, C 1 -C 3 fluoroalkyl, C 1 -C 3 alkoxy, C 1 -C 3 fluoroalkoxy, C 1 -C 3 alkylthio, C 1 -C 3 alkylsulfinyl, C 1 -C 3 alkylsulfonyl, halogen, cyano, or nitro), heteroaryl(C 1 -C 5 )alkyl (wherein the heteroaryl is optionally substituted by 1, 2 or 3 of, independently, C 1 -C 3 alkyl, C 1 -C 3 fluoroalkyl, C 1 -C 3 alkoxy, C 1 -C 3 fluoroalkoxy, C 1 -C 3 alkylthio, C 1 -C 3 alkylsulfinyl, C 1 -C 3 alkylsulfonyl, halogen, cyano, or nitro), C 2 -C 5 fluoroalkenyl, C 3 -C 8 cycloalkyl; phenyl or phenyl substituted by 1, 2 or 3 of, independently, C 1 -C 3 alkyl, C 1 -C 3 fluoroalkyl, C 1 -C 3 alkoxy, C 1 -C 3 fluoroalkoxy, halogen, cyano or nitro; heteroaryl or heteroaryl substituted by 1, 2 or 3 of, independently, C 1 -C 3 alkyl, C 1 -C 3 fluoroalkyl, C 1 -C 3 alkoxy, C 1 -C 3 fluoroalkoxy, halogen, cyano or nitro; heteroarylamino or heteroarylamino substituted by 1, 2 or 3 of, independently, C 1 -C 3 alkyl, C 1 -C 3 fluoroalkyl, C 1 -C 3 alkoxy, C 1 -C 3 fluoroalkoxy, halogen, cyano or nitro; diheteroarylamino or diheteroarylamino substituted by 1, 2 or 3 of, independently, C 1 -C 3 alkyl, C 1 -C 3 fluoroalkyl, C 1 -C 3 alkoxy, C 1 -C 3 fluoroalkoxy, halogen, cyano or nitro; phenylamino or phenylamino substituted by 1, 2 or 3 of, independently, C 1 -C 3 alkyl, C 1 -C 3 fluoroalkyl, C 1 -C 3 alkoxy, C 1 -C 3 fluoroalkoxy, halogen, cyano or nitro; diphenylamino or diphenylamino substituted by 1, 2 or 3 of, independently, C 1 -C 3 alkyl, C 1 -C 3 fluoroalkyl, C 1 -C 3 alkoxy, C 1 -C 3 fluoroalkoxy, halogen, cyano or nitro; or C 3 -C 7 cycloalkylamino, di(C 3 -C 7 cycloalkyl)amino, C 3 -C 7 cycloalkoxy, C 1 -C 10 alkoxy, C 1 -C 10 fluoroalkoxy, C 1 -C 5 alkylamino or di(C 1 -C 4 alkyl)amino;

R f and R g are are each independently of each other C 1 -C 10 alkyl, C 2 -C 10 alkenyl, C 2 -C 10 alkynyl, C 1 -C 10 alkoxy, C 1 -C 10 fluoroalkyl, C 1 -C 10 cyanoalkyl, C 1 -C 10 nitroalkyl, C 1 -C 10 aminoalkyl, C 1 -C 5 alkylamino(C 1 -C 5 )alkyl, C 2 -C 8 dialkylamino(C 1 -C 5 )alkyl, C 3 -C 7 cycloalkyl(C 1 -C 5 )alkyl, C 1 -C 5 alkoxy(C 1 -C 5 )alkyl, C 3 -C 5 alkenyloxy(C 1 -C 5 )alkyl, C 3 -C 5 alkynyloxy(C 1 -C 5 )alkyl, C 1 -C 5 alkylthio(C 1 -C 5 )alkyl, C 1 -C 5 alkylsulfinyl(C 1 -C 5 )alkyl, C 1 -C 5 alkylsulfonyl(C 1 -C 5 )alkyl, C 2 -C 8 alkylideneaminoxy(C 1 -C 5 )alkyl, C 1 -C 5 alkylcarbonyl(C 1 -C 5 )alkyl, C 1 -C 5 alkoxycarbonyl(C 1 -C 5 )alkyl, aminocarbonyl(C 1 -C 5 )alkyl, C 1 -C 5 alkylaminocarbonyl(C 1 -C 5 )alkyl, C 2 -C 8 dialkylaminocarbonyl(C 1 -C 5 )alkyl, C 1 -C 5 alkylcarbonylamino(C 1 -C 5 )alkyl, N—(C 1 -C 5 )alkylcarbonyl-N—(C 2 -C 5 )alkylaminoalkyl, C 3 -C 6 trialkylsilyl(C 1 -C 5 )alkyl, phenyl(C 1 -C 5 )alkyl (wherein the phenyl is optionally substituted by 1, 2 or 3 of, independently, C 1 -C 3 alkyl, C 1 -C 3 fluoroalkyl, C 1 -C 3 alkoxy, C 1 -C 3 fluoroalkoxy, C 1 -C 3 alkylthio, C 1 -C 3 alkylsulfinyl, C 1 -C 3 alkylsulfonyl, halogen, cyano, or nitro), heteroaryl(C 1 -C 5 )alkyl (wherein the heteroaryl is optionally substituted by 1, 2 or 3 of, independently, C 1 -C 3 alkyl, C 1 -C 3 fluoroalkyl, C 1 -C 3 alkoxy, C 1 -C 3 fluoroalkoxy, C 1 -C 3 alkylthio, C 1 -C 3 alkylsulfinyl, C 1 -C 3 alkylsulfonyl, halogen, cyano, or nitro), C 2 -C 5 fluoroalkenyl, C 3 -C 8 cycloalkyl; phenyl or phenyl substituted by 1, 2 or 3 of, independently, C 1 -C 3 alkyl, C 1 -C 3 fluoroalkyl, C 1 -C 3 alkoxy, C 1 -C 3 fluoroalkoxy, halogen, cyano or nitro; heteroaryl or heteroaryl substituted by 1, 2 or 3 of, independently, C 1 -C 3 alkyl, C 1 -C 3 fluoroalkyl, C 1 -C 3 alkoxy, C 1 -C 3 fluoroalkoxy, halogen, cyano or nitro; heteroarylamino or heteroarylamino substituted by 1, 2 or 3 of, independently, C 1 -C 3 alkyl, C 1 -C 3 fluoroalkyl, C 1 -C 3 alkoxy, C 1 -C 3 fluoroalkoxy, halogen, cyano or nitro; diheteroarylamino or diheteroarylamino substituted by 1, 2 or 3 of, independently, C 1 -C 3 alkyl, C 1 -C 3 fluoroalkyl, C 1 -C 3 alkoxy, C 1 -C 3 fluoroalkoxy, halogen, cyano or nitro; diphenylamino or diphenylamino substituted by 1, 2 or 3 of, independently, C 1 -C 3 alkyl, C 1 -C 3 fluoroalkyl, C 1 -C 3 alkoxy, C 1 -C 3 fluoroalkoxy, halogen, cyano or nitro; or C 3 -C 7 cycloalkylamino, di(C 3 -C 7 cycloalkyl)amino, C 3 -C 7 cycloalkoxy, C 1 -C 10 fluoroalkoxy, C 1 -C 5 alkylamino or di(C 1 -C 4 alkyl)amino; or benzyloxy or phenoxy, wherein the benzyl and phenyl groups are in turn optionally substituted by 1, 2 or 3 of, independently, C 1 -C 3 alkyl, C 1 -C 3 fluoroalkyl, C 1 -C 3 alkoxy, C 1 -C 3 fluoroalkoxy, halogen, cyano or nitro; and

R h is C 1 -C 10 alkyl, C 3 -C 10 alkenyl, C 3 -C 10 alkynyl, C 1 -C 10 fluoroalkyl, C 1 -C 10 cyanoalkyl, C 1 -C 10 nitroalkyl, C 2 -C 10 aminoalkyl, C 1 -C 5 alkylamino(C 1 -C 5 )alkyl, C 3 -C 8 dialkylamino(C 1 -C 5 )alkyl, C 3 -C 7 cycloalkyl(C 1 -C 5 )alkyl, C 1 -C 5 alkoxy(C 1 -C 5 )alkyl, C 3 -C 5 alkenyloxy(C 1 -C 5 )alkyl, C 3 -C 5 alkynyloxy(C 1 -C 5 )alkyl, C 1 -C 5 alkylthio(C 1 -C 5 )alkyl, C 1 -C 5 alkylsulfinyl(C 1 -C 5 )alkyl, C 1 -C 5 alkylsulfonyl(C 1 -C 5 )alkyl, C 2 -C 8 alkylideneaminoxy(C 1 -C 5 )alkyl, C 1 -C 5 alkylcarbonyl(C 1 -C 5 )alkyl, C 1 -C 5 alkoxycarbonyl(C 1 -C 5 )alkyl, aminocarbonyl(C 1 -C 5 )alkyl, C 1 -C 5 alkylaminocarbonyl(C 1 -C 5 )alkyl, C 2 -C 8 dialkylaminocarbonyl(C 1 -C 5 )alkyl, C 1 -C 5 alkylcarbonylamino(C 1 -C 5 )alkyl, N—(C 1 -C 5 )alkylcarbonyl-N—(C 1 -C 5 )alkylamino(C 1 -C 5 )alkyl, C 3 -C 6 trialkylsilyl(C 1 -C 5 )alkyl, phenyl(C 1 -C 5 )alkyl (wherein the phenyl is optionally substituted by 1, 2 or 3 of, independently, C 1 -C 3 alkyl, C 1 -C 3 fluoroalkyl, C 1 -C 3 alkoxy, C 1 -C 3 fluoroalkoxy, C 1 -C 3 alkylthio, C 1 -C 3 alkylsulfinyl, C 1 -C 3 alkylsulfonyl, halogen, cyano or nitro), heteroaryl(C 1 -C 5 )alkyl (wherein the heteroaryl is optionally substituted by 1, 2 or 3 of, independently, C 1 -C 3 alkyl, C 1 -C 3 fluoroalkyl, C 1 -C 3 alkoxy, C 1 -C 3 fluoroalkoxy, C 1 -C 3 alkylthio, C 1 -C 3 alkylsulfinyl, C 1 -C 3 alkylsulfonyl, halogen, cyano or nitro), phenoxy(C 1 -C 5 )alkyl (wherein the phenyl is optionally substituted by 1, 2 or 3 of, independently, C 1 -C 3 alkyl, C 1 -C 3 fluoroalkyl, C 1 -C 3 alkoxy, C 1 -C 3 fluoroalkoxy, C 1 -C 3 alkylthio, C 1 -C 3 alkylsulfinyl, C 1 -C 3 alkylsulfonyl, halogen, cyano or nitro), heteroaryloxy(C 1 -C 5 )alkyl (wherein the heteroaryl is optionally substituted by 1, 2 or 3 of, independently, C 1 -C 3 alkyl, C 1 -C 3 fluoroalkyl, C 1 -C 3 alkoxy, C 1 -C 3 fluoroalkoxy, C 1 -C 3 alkylthio, C 1 -C 3 alkylsulfinyl, C 1 -C 3 alkylsulfonyl, halogen, cyano or nitro), C 3 -C 5 fluoroalkenyl, C 3 -C 8 cycloalkyl; phenyl or phenyl substituted by 1, 2 or 3 of, independently, C 1 -C 3 alkyl, C 1 -C 3 fluoroalkyl, C 1 -C 3 alkoxy, C 1 -C 3 fluoroalkoxy, halogen, cyano or nitro; heteroaryl or heteroaryl substituted by 1, 2 or 3 of, independently, C 1 -C 3 alkyl, C 1 -C 3 fluoroalkyl, C 1 -C 3 alkoxy, C 1 -C 3 fluoroalkoxy, halogen, cyano or nitro; C 1 -C 6 alkyl-C(O)—; C 1 -C 6 alkoxy-C(O)—; or phenyl-C(O)— wherein the phenyl is optionally substituted by 1 or 2 of, independently, C 1 -C 2 alkyl, C 1 fluoroalkyl, C 1 -C 2 alkoxy, C 1 fluoroalkoxy, fluorine, chlorine, bromine, cyano or nitro.

2. The compound according to claim 1 , wherein G is hydrogen.

3. The compound according to claim 1 , wherein R 5 , R 6 , R 7 , R 8 , R 9 and R 10 are hydrogen.

4. The compound according to claim 1 , wherein R 2 is selected from the group consisting of methyl, prop-1-ynyl and an optionally substituted monocyclic heteroaryl selected from the group consisting of R 2a and R 2b :

in which:

X 1 is N or CH;

X 2 is N or CR a ;

R a is selected from the group consisting of hydrogen, fluorine, chlorine and C 1 fluoroalkyl;

R b is selected from the group consisting of hydrogen, fluorine, chlorine and C 1 fluoroalkyl;

R b is selected from the group consisting of hydrogen, fluorine, chlorine, bromine, methyl, C 1 fluoroalkyl and cyano; and

R d is selected from the group consisting of hydrogen, fluorine, chlorine, bromine, methyl, C 1 fluoroalkyl and cyano.

5. The compound according to claim 1 , wherein R 1 and R 3 are methyl.

6. The compound according to claim 1 , wherein R 1 is methyl, R 2 is methyl and R 3 is methyl.

7. The compound of claim 1 , wherein the compound of formula (I) is a compound of formula (Ia):

wherein R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 , R 9 , R 10 , R 11 , R 12 and G are as defined therein.

8. The compound according to claim 7 , wherein, more than 50% by molarity of the compound of formula (Ia) has the indicated stereochemistry at the ring-carbon atom bonded to R 6 and —CR 7 R 8 —CR 9 R 10 —NR 11 R 12 .

9. A herbicidal composition which comprises a compound of formula (I) as defined in claim 1 , and an agrochemically acceptable carrier, diluent and/or solvent.

10. The herbicidal composition according to claim 9 , which comprises one or more further herbicides and/or a safener.

11. A method of controlling grassy monocotyledonous weeds in crops of useful plants, comprising applying a herbicidal composition according to claim 9 , to the weeds or to the locus thereof.