| 摘要 |
A compound of general formula I <IMAGE> (I) wherein n is 1 or 2; R1 and R2 are each independently hydrogen, hydroxy, substituted or unsubstituted C1-4 alkyl, substituted or unsubstituted C1-4 alkoxy or halogeno; R5 is hydrogen, substituted or unsubstituted C1-4 alkyl, amino or NR6R7; R3, R4, R6 and R7 are each independently hydrogen or (CH2)m-[NH(CH2)x]y-NHR11 wherein m is from 0-5, y is from 0-5 and each x is independently from 1-5 and R11 is hydrogen or C(NH)NH2; provided that when R3 and R4 are both hydrogen, R5 is amino or NR6R7; pharmaceutically acceptable salts and optically active isomers thereof. |
