Substituted cyclohexylidene-ethylidene-octahydro-indene compounds

A compound of formula I:

• Wherein:
• R1 and R2 are independently H, C(1-4) alkyl, halogen, cycloalkyl;
• R3 and R4 are independently OH, OAlk, Alk denoting a C(1-4) alkyl group, halogen, CN, NH2, NO2, 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 (C1-C4), 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 H, 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.