| abstract |
ABSTRACT OF THE DISCLOSURE Process for preparing compounds which, in form of therapeutical compositions, exhibit antitumoral activity. These compounds are of the general formula I: I wnerein R1 represents a hydrogen atom or a hydroxy or methoxy group, R2 represents a hydrogen atom or a hydroxy group, and each of R3 and R4 independently represents a hydrogen atom or a methyl group, with the proviso that R3 and R4 do not simultaneously re-present hydrogen atoms and the pharmaceutically acceptable addi-tion salts thereof. |