Neridienone B has significant effects on calcein accumulation. Neridienone exhibits significant leishmanicidal activity against amastigotes of L. mexicana.
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.
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.