Abstract: Compound of formula (I): wherein: R represents hydrogen or a group selected from alkenyl and optionally substituted alkyl, each of R1 to R8, which may be identical or different, represents hydrogen or a group selected from alkyl, alkenyl, hydroxy, alkoxy, alkenyloxy, arylalkyl, arylalkoxy, carboxy, acyloxy and arylcarbonyloxy, or one of R1 to R8 forms with an adjacent one R1 to R8 an alkylenedioxy group, its optical isomers when they exist, and addition salts thereof with a pharmaceutically acceptable acid or base, with the proviso that: when R does not represent hydrogen, then at least one of R1 to R8 represents hydroxy or acyloxy, and the compounds of formula (I) are other than indeno[1,2-b]indol-10(5H)-one and medicinal products containing the same which are useful for treatment of disorders of the melatoninergic system.

Abstract: A compound of formula (I): wherein: R represents hydrogen, optionally substituted alkyl or alkenyl, R1 to R8, which may be identical or different, each represents hydrogen, optionally substituted alkyl, hydroxy, acyloxy, optionally substituted amino, carboxy, optionally substituted alkoxy, or alkenyloxy, or one of R1 to R8 forms, with another of R1 to R8 that is adjacent, an alkylenedioxy group, X represents oxygen or NR16 wherein R16 represents hydrogen, alkyl, aryl or arylalkyl, R9 represents hydrogen, aryl, heteroaryl, or optionally substituted, saturated or unsaturated alkyl, an isomer thereof, or an addition salt thereof with a pharmaceutically acceptable acid or base. Medicinal products containing the same which are useful as anti-cancer agents.

Abstract: Compound of formula (I): 1

Abstract: Compound of formula (I): 1

Abstract: Compound of formula (I): wherein: R1, R2, R3, R4, R5, R6 and R8, which may be identical or different, each represents hydrogen, alkyl, arylalkyl, hydroxy, alkoxy, arylalkoxy, acyloxy, arylcarbonyloxy, carboxyalkyl or carboxy, R7 represents hydrogen, hydroxy, alkoxy, arylalkoxy, acyloxy or arylcarbonyloxy group, or one of R1 to R8, together with another of R1 to R8 adjacent to it, forms an alkylenedioxy, its optical isomers, and addition salts thereof with a pharmaceutically acceptable acid or base.