Patent ID: 8716334

Claim:
A compound of formula I: wherein: R 1 and R 2 are independently H, C( 1-4 ) alkyl, halogen, cycloalkyl; R 3 and R 4 are independently OH, OAlk, Alk denoting a C( 1-4 ) alkyl group, halogen, CN, NH 2 , NO 2 , C( 1-4 ) alkylene, haloalkyl; L is carbon and optionally forms a double bond with P or with X, or L forms an epoxide with P; P is carbon and optionally forms a double bond with L or M, or P forms an epoxide with L or M or P is O; Q is nothing, or a carbonyl; M is an alkylene (C 1 -C 4 ), or optionally a carbon which forms a double bond with P, or M forms an epoxide with P; Y is nothing, H, OH, OAlk, Alk denoting a C( 1-4 ) alkyl group, O—CO-alkyl; X is oxo, OH, or halogen, OAlk, Alk denoting a C( 1-4 ) alkyl group, O—CO-alkyl; Z is H, oxo, OH or halogen, OAlk, Alk denoting a C( 1-4 ) alkyl group, O—CO-alkyl; Or L, P, M, Z and X forms a saturated or unsaturated 5-7 membered, carbocyclic or heterocyclic ring, wherein L, P, M are defined as above and X and Z are independently O, N, S or C.