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Daphenylline, a New Alkaloid with an Unusual Skeleton, from Daphniphyllum longeracemosum

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journal contribution
posted on 2009-06-04, 00:00 authored by Qiang Zhang, Ying-Tong Di, Chun-Shun Li, Xin Fang, Cheng-Jian Tan, Zhen Zhang, Yu Zhang, Hong-Ping He, Shun-Lin Li, Xiao-Jiang Hao
A new alkaloid, daphenylline (1), with an unprecedented rearranged 22-nor-calyciphylline skeleton, was isolated from the fruits of Daphniphyllum longeracemosum. Its structure and stereochemistry were elucidated on the basis of spectroscopic and computational approaches. A plausible biosynthetic pathway of 1 was also proposed.