Lycopalhine A, a novel sterically congested Lycopodium alkaloid with an unprecedented skeleton from Palhinhaea cernua

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Abstract

A novel sterically congested Lycopodium alkaloid named lycopalhine A (1) that possesses a fused hexacyclic (5/5/5/6/6/6) ring system comprising a 5,9-diaza-tricyclo[6.2.1.0(4,9)]undecane moiety and a tricyclo[5.2.1.0(4,8)]decane moiety was isolated from Palhinhaea cernua L. The structure and absolute configuration were determined by spectroscopic and computational methods.

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