Boron-containing small molecules

1. A compound having a structure which is:

wherein R 3 is —CH 2 NH 2 ;

R 4 is selected from the group consisting of halogen, methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl, methoxy, ethoxy, propoxy, isopropoxy, butoxy, isobutoxy, and sec-butoxy;

Y is O; and

R 5 is

wherein a is 2, 3 or 4;

R 10 and R 11 is H; and

R 12 is selected from the group consisting of H, OH, NH 2 , methyl, ethyl, —NHS(O) 2 CH 3 , cyano, —NHC(O)CH 3 , —NHC(O)NHCH 2 CH 3 , —C(O)NH 2 , —C(O)OH, 4-(methoxy)phenyl, benzyl, benzoxy, —NHC(O)OCH 2 Ph, —C(O)NHCH 2 CH 2 OH and —C(NH 2 )(NH);

or a salt, hydrate or solvate thereof.