| abstract |
The present invention provides anti-neoplastic topoisomerase I inhibitors of formula (I) wherein Ar is (C6-C12)aryl or (5- to 12-membered) heteroaryl comprising 1-3 N, S or non peroxyde O, wherein N is unsubstituted or is substituted with (C1-C4)alkyl; X is H, CN, CHO, OH, acetyl, CF3, O(C1-C4)alkyl, NO2, NH2, halogen or halo-(C1-C4)alkyl; each Y is individually H, (C1-C4)alkyl or aralkyl; Y' is H or (C1-C4)alkyl; n is 0 or 1; and each Z is individually H, (C1-C4)alkyl, halogen or halo(C1-C4)alkyl; or a pharmaceutically acceptable salt thereof. |