Abstract: The present invention relates to a compound derived from indole corresponding to the following formula II: wherein X represents N, CR8 or N+R8, wherein R8 represents a hydrogen atom, a hydroxyl or alkyl or methoxy group optionally substituted with a phenyl group; R2, R3 and R4 independently represent a hydrogen atom or a halogen atom or an optionally substituted alkyl, amine, alkene, ester, sulfonamide, ether or benzyl group; R5 represents a hydrogen atom or an optionally substituted, saturated or unsaturated alkyl group, amine, benzyl group; R6 represents an optionally substituted C1-C3 alkyl group; R7 represents a hydrogen atom or an optionally substituted C1-C3 alkyl group and R7 is absent when the ring A is in the b position, and A represents a ring; R9 and R10 represent together a carbon bond or independently represent an R11 OR11, SR11 group; wherein R11 represents a hydrogen atom, an optionally substituted, saturated or unsaturated, C1-C3 alkyl group, which may contain one or more sulfur, oxygen or