New Secodaphnane-Type Alkaloids with Cytotoxic Activities from Daphniphyllum angustifolium Hutch

One new Daphniphyllum alkaloid, daphnioldhanol A ( 1 ), together with three known ones, were isolated from the stem part of Daphniphyllum angustifolium Hutch. Their structures were elucidated by spectroscopic methods and comparing with the literature data. Compound 2 is a new natural product, but known by synthesis as a racemate. Compound 1 exhibited week cytotoxic activity against Hela cell line with IC 50 of 31.9 μM. Graphic Abstract