| 摘要 |
Novel pyrazolotetracyclines are described, which have formula (I), in which R is hydrogen, a substituted or unsubstituted (C1-C6)alkyl, (C2-C6)alkenyl or (C2-C6)alkynyl group, a substituted or unsubstituted aryl or heteroaryl group, a substituted or unsubstituted cycloalkyl, cycloalkenyl or cycloalkadienyl group and R' represents an amino, dimethylamino, (C1-C3)alkylamino or formylamino group. These pyrazolotetracyclines are antibiotics useful for the treatment of infectious diseases. |
