| abstract |
The compound of formula (I) in which R represents a hydrogen atom, an optionally substituted alkyl group or an alkenyl group, R-R which may be the same or different, each represents a hydrogen atom, or an optionally substituted alkyl group, a hydroxy group, an optionally substituted amino group, a carboxy group, an optionally substituted alkoxy group, or one of the groups from R to R forms with the other of the groups from R to R, which is adjacent, an alkylenedioxy group, X represents an oxygen atom or a group of NR, in which is a hydrogen atom, an alkyl, aryl or aralkyl group; R represents a hydrogen atom, an aryl group, a heteroaryl group or an optionally substituted, saturated or unsaturated alkyl group, their isomers, and their addition salts with a pharmaceutically acceptable acid or base. Medications. |