Abstract

Cephaloliverols A (1) and B (2), two meroterpenoids based on a sterol and an abietane diterpene possessing a dioxane ring, were isolated from the twigs and leaves of Cephalotaxus oliveri. Their structures were established by spectroscopic analysis and quantum chemical calculation. 1 and 2 represent the first sterol-hybrid meroditerpenoids. The two compounds and their precursors decreased NO production in a dose-dependent manner in LPS-stimulated RAW 264.7 macrophages.

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