Daphnezomines H, I, J, and K, New Daphnilactone-type and Yuzurimine-type Alkaloids from Daphniphyllum humile

Daphnezomines H (1), I (2), J (3), and K (4), four new alkaloids possessing a daphnilactone-type (1 and 2) or a yuzurimine-type skeleton (3 and 4) have been isolated from the leaves (1), stems (2) and fruits (3 and 4) of Daphniphyllum humile, respectively, and the structures including relative stereochemistry were elucidated on the basis of spectroscopic data.