| 摘要 |
The invention relates to the derivatives of general formula (I) in which Ris: a phenyl group, which is optionally substituted one or more times independently by one or two atoms or groups selected from halogen, (C-C)alkyl, halo(C-C)alkyl, (C-C)alkoxy, halo(C-C)alkoxy, hydroxyl, cyano, nitro, NRR, phenyl; or naphthyl;Ris hydrogen or (C-C)alkyl, Ris hydrogen, (C-C)alkyl, phenyl; Ris hydrogen, (C-C)alkyl optionally substituted with (C-C)alkoxy; phenyl optionally substituted with a substituent selected from halogen, (C-C)alkyl, halo(C-C)alkyl, nitro, cyano, (C-C)alkyl (CO)-, CONRR; Rand Rare, independently of one another, hydrogen or (C-C)alkyl; being in the form of a base or of an addition salt with an acid. |
