Avermectin B1 and avermectin B1 monosaccharide derivatives having an alkoxymethyl substituent in the 4″-or 4′-position

What is described are a compound of the formula wherein n is 0 or 1; A-B is —CH═CH— or —CH 2 —CH 2 —; R 1 is C 1 -C 12 -alkyl, C 3 -C 8 -cycloalkyl or C 2 -C 12 -alkenyl; R 2 is for example C 1 -C 12 -alkyl, C 2 -C 12 -alkenyl or C 2 -C 12 -alkinyl; which are optionally substituted with one to five substituents selected from the group consisting of OH, halogen, CN, —N 3 , —NO 2 , C 3 -C 8 -Cycloalkyl, norbornylenyl-, C 3 -C 8 -Cycloalkenyl; C 3 -C 8 -halocycloalkyl, C 1 -C 12 -alkoxy, C 1 -C 6 -alkoxy-C 1 -C 6 -alkoxy, C 3 -C 8 -cycloalkoxy, C 1 -C 12 -haloalkoxy, C 1 -C 12 -alkylthio, C 3 -C 8 -cycloalkylthio, C 1 -C 12 -haloalkylthio, C 1 -C 12 -alkylsulfinyl, C 3 -C 8 -cycloalkylsulfinyl, C 1 -C 12 -haloalkylsulfinyl, C 3 -C 8 -halocycloalkylsulfinyl, C 1 -C 12 -alkylsulfonyl, C 3 -C 8 -cycloalkylsulfonyl, C 1 -C 12 -haloalkylsulfonyl, C 3 -C 8 -halocycloalkylsulfonyl, —NR 4 R 6 , —X—C(═Y)—R 4 , —X—C(═Y)—Z—R 4 , —P(═O)(OC 1 -C 6 -alkyl) 2 , aryl, heterocyclyl, aryloxy, arylthio and heterocyclyloxy; R 3 is for example H, C 1 -C 12 -alkyl or C 1 -C 12 -alkyl which is optionally substituted and, where applicable, to E/Z isomers, mixtures of E/Z isomers and/or tautomers, in each case in free form or in salt form; a process for preparing and using these compounds and their tautomers; pesticides whose active compound is selected from these compounds and their tautomers; and a process for preparing these compounds and compositions, and the use of these compounds and compositions.