| abstract |
1. A compound represented by the formula (I): characterized in that: R1, R3, R4 and R5 are the same or different and each is a hydrogen atom, a halogen atom, an optionally substituted hydrocarbon group or a group optionally substituted hydroxy; R2 is a halogen atom, a nitro group, an optionally substituted hydrocarbon group, an optionally substituted hydroxy group, an optionally substituted amino group, an optionally substituted mercapto group, an optionally substituted acyl group or an optionally substituted heterocyclic group ; R10 and R11 are the same or different and each is a hydrogen atom, a halogen atom or an alkoxy group of 1 to 6 carbon atoms; E is a bond, an alkylene group of 1 to 4 carbon atoms substituted optionally, -W1-O-W2-, -W1-S-W2- or -W1-N (R6) -W2- (where W1 and W2 are the same or different and each is a bond or an alkylene group of 1 to 3 carbon atoms optionally substituted and R6 is an atom of hydrogen, an optionally substituted acyl group or an optionally substituted hydrocarbon group); the S1 ring is a benzene ring which optionally also has substituents selected from a halogen atom, an optionally substituted hydrocarbon group, an optionally substituted hydroxy group and a group optionally substituted amino; and R is an optionally substituted hydroxy group or an optionally substituted amino group, with the proviso that R1 and R3 are not simultaneously a hydrogen atom or a salt thereof.2.- The compound according to claim 1, characterized in that R2 it is a halogen atom, an optionally substituted hydrocarbon group, an optionally substituted hydroxy group, an optionally substituted amino group, an optionally substituted mercapto group or an optionally substituted heterocyclic group, and R10 and R11 are both hydrogen atoms or a salt thereof . |