Patent ID: 8394826

Claim:
A compound according to Formula I: and salts thereof, wherein R 1 , R 2 , and R 3 are independently hydrogen, C 1 -C 4 alkyl, aryl, C 1 -C 4 alkyl aryl, C 1 -C 4 alkyl heteroaryl, C 1 -C 4 alkyl heterocyclyl, C 2 -C 4 alkenyl, C 2 -C 4 alkynyl, C 1 -C 4 carbonyl, C 1 -C 4 carbonylamino, C 1 -C 4 alkoxy, C 1 -C 4 sulfonyl, C 1 -C 4 sulfonylamino, C 1 -C 4 thioalkyl, C 1 -C 4 carboxyl, or form a ring with each other or with A; wherein A is C 1 -C 4 alkyl, C 1 -C 4 alkyl aryl, C 1 -C 4 alkyl heteroaryl, or forms a ring structure with R 1 , R 2 or R 3 ; wherein B is hydrogen, an aryl group, a heteroaryl group, a cycloalkyl group, a heterocycloalkyl group, C 1 -C 22 alkyl, C 1 -C 22 alkyl aryl, C 1 -C 22 alkyl heteroaryl, C 2 -C 22 alkenyl, C 2 -C 22 alkynyl, C 1 -C 22 carbonyl, C 1 -C 22 carbonylamino, C 1 -C 22 alkoxy, C 1 -C 22 sulfonyl, C 1 -C 22 sulfonylamino, C 1 -C 22 thioalkyl, or C 1 -C 22 carboxyl; wherein X 1 , X 2 , and X 3 are, independently, hydrogen, hydroxyl, halogen, C 1 -C 4 alkyl, C 2 -C 4 alkenyl, C 2 -C 4 alkynyl, amino, aminocarbonyl, nitro, cyano, C 1 -C 4 carbonyl, C 1 -C 4 carbonylamino, C 1 -C 4 alkoxy, C 1 -C 4 sulfonyl, C 1 -C 4 sulfonylamino, C 1 -C 4 thioalkyl, or C 1 -C 4 carboxyl; wherein the double circle indicates an aromatic or heteroaromatic ring; and wherein each Z is independently a bond, is C 1 -C 4 alkyl, heteroalkyl, or an O atom.