Semisynthetic pyrrolizidine alkaloid N-oxide antitumor agents. Esters of heliotridine
作者:Leon H. Zalkow、Jan A. Glinski、Leslie T. Gelbaum、David Moore、Deborah Melder、Garth Powis
DOI:10.1021/jm00403a008
日期:1988.8
lbutyric acid were prepared, converted into their N-oxides, and compared with the corresponding C-9 monoesters of retronecine in the in vivo P388 lymphocytic leukemia screen. Relative in vitro cytotoxicities of some of the free bases and their corresponding N-oxides were also measured against the A204 rhabdomyosarcoma cell line by using the soft agar colony forming assay. Stereochemistry at C-7 of