5 resultados
Additional and confirming chemical and spectroscopic evidence for vindolicine (4), roseadine (5), and leurosine-N'b-oxide (6) is presented. Leurosine-N'b-oxide (6) was found to be exceptionally active in the B-16 melanoma test system in vivo. Roseadine (5), a new isolate of Catharanthus roseus, and
The bisindole alkaloids vinblastine, vincristine, and N-formyl-leurosine were nitrated and subsequently converted to amino derivatives. In the case of compounds 5e and 5b cytotoxic activity has been found for non-small cell lung cancer and breast cancer in the concentration range tested
P388 leukemia-bearing mice were given a single i.p. injection of [14C]-vincristine and the levels of radioactivity in the tumors and host tissues were determined as a function of time. The highest levels of radioactivity were found in the gallbladder followed by the tumor, spleen and liver,