Abstract: The invention concerns novel flavone and isoflavone derivatives of formulae (Ia) and (Ib) wherein: X represents a group of formula —COOR, or —PO(OR)2; R represents a hydrogen atom or an alkaline or alkaline-earth metal, or a lower alkyl group; R1 represents a hydroxy group, a lower alkoxy group or an acyloxy group; R2 and R3, identical or different, represent a hydrogen or halogen atom, or a trifluoromethyl group, a trichloromethyl group, a hydroxy group, an alkoxy group or an acyloxy group comprising 1 to 5 carbon atoms, or R2 and R3 can combine to form an alkylene dioxy group. The invention is useful for rheumatic diseases.

Abstract: The invention concerns novel flavone and isoflavone derivatives of formulae (Ia) and (Ib) wherein: X represents a group of formula —COOR, or —PO(OR)2; R represents a hydrogen atom or an alkaline or alkaline-earth metal, or a lower alkyl group; R1 represents a hydroxy group, a lower alkoxy group or an acyloxy group; R2 and R3, identical or different, represent a hydrogen or halogen atom, or a trifluoromethyl group, a trichloromethyl group, a hydroxy group, an alkoxy group or an acyloxy group comprising 1 to 5 carbon atoms, or R2 and R3 can combine to form an alkylene dioxy group. The invention is useful for rheumatic diseases.

Abstract: Glycosylated prodrugs, a preparation method therefor, and their use with tumor-specific immunoenzymatic conjugates for the treatment of cancer, are described. These anthracycline prodrugs have formula (I).

Abstract: The present invention relates to new anthracyclines corresponding to the general formula I below: ##STR1## in which R' and R", which may be identical or different, denote a hydrogen atom (and in this case R' is different from R") or the group --(CH.sub.2).sub.n --R.sub.1 --(CH.sub.2).sub.m --R.sub.2 where n is between 1 and 6,m is between 0 and 4 (with the proviso, of course, that if m=0, R.sub.2 is nonexistent)R.sub.1 denotes one of the following groups: ##STR2## (in this case, m=0) ##STR3## (in this case m=0) where R.sub.3 and R.sub.4, which may be identical or different, denote a hydrogen atom or a substituted or unsubstituted alkyl group)--C.tbd.N (in this case m=0)--S----O--(with the proviso that m is other than 0) ##STR4## (m=0 and R.sub.3 R.sub.4 have the same meaning as above) and R.sub.2 denotes (in the case where m is other than 0) a hydrogen atom or alkyl or alkoxy groups or ##STR5## (R.sub.3 and R.sub.4 having the same meaning as above).

Abstract: The present invention relates to new aglycons which correspond to the general formula: ##STR1## in which: R.sub.1, R.sub.2, R.sub.3 and R.sub.5, which can be identical or different, represent a hydrogen atom or a group OH, OMetal or OR.sub.4, R.sub.4 being a substituted or unsubstituted C.sub.1 to C.sub.6 alkyl group,R represents a hydrogen atom or a group COCH.sub.2 R', R' being hydrogen or an alkyl, hydroxyl, alkoxy or aryl group,R.sub.6 and R.sub.7, which are always different, represent either a hydrogen atom or an OH group, andR.sub.8 represents a hydrogen atom or the group CH.sub.3 CO--.Application to the preparation of antibiotics and antitumoral agents.