Abstract
Six new Daphniphyllum alkaloids, calyciphyllines H–M ( 1– 6), were isolated from the leaves and stems of Daphniphyllum calycinum (Daphniphyllaceae). The structures and relative stereochemistry of 1– 6 were elucidated on the basis of spectroscopic data, and the absolute stereochemistry of 3 was assigned by PGME method.
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