| abstract |
The invention relates to new chemical compounds. They are compounds corresponding to formula Ia. <IMAGE> (Ia) in which: R'3 represents a hydrogen atom or a hydroxy radical; R'5 represents a hydrogen atom or a hydroxy radical; or R'3 and R'5 together represent an epoxy bridge or a double bond; R''5 represents a hydrogen atom or an ethyl radical; R'7 and R'8 are the same or different and represent a hydrogen atom or a methyl, hydroxymethylene, alkoxymethylene, aryloxymethylene, aminomethylene, monoalkyl or dialkyl aminomethylene, acylmethylene, arylaminomethylene, hydroxyethyl aminomethylene, alkylthiomethylene, aryloxythiomethylene or cyanomethylene radical; R1 represents a hydrogen atom or an alkyl, formyl or acyl radical: R2 represents a hydrogen atom or an alkoxy radical; R7 represents an alkanoyloxy radical, the broken line representing an optional double bond. These compounds can be used as drugs. |