17alpha-Neriifolin and 17alpha-Deacetyltanghinin have little anti-proliferative activity, indicating that the 17beta configuration is critical for the anti-proliferative activity of these compounds.
Neridienone B has significant effects on calcein accumulation. Neridienone exhibits significant leishmanicidal activity against amastigotes of L. mexicana.
An antitumor agent containing at least one compound selected from the group consisting of nerigoside, oleandrigenin, sarmentoside, oleaside A, oleandrin, 8β-hydroxy odoroside A, narciclasine, trans-dihydronarciclasine and bisdeoxynarciclasine is provided, this antitumor agent has an advantage of having an excellent therapeutic effect of tumor and less side effects.