Neutral Constituents of the Methanol Extract from Twigs of Metasequoia glyptostroboides HU et CHENG

Abstract

Neutral constituents extracted from Metasequoia glyptostroboides HU et CHENG were investigated and seven steroids, β-sitosterol, stigmasterol, campesterol, stigmast-4-en-3-one, stigmasta-4, 22-dien-3-one, campest-4-en-3-one, and 5α-stigmastan-3, 6-dione, together with α-cadinol, m-cresol, and methyl esters of fourteen fatty acids, were identified. This is the first case that 5α-stigmastan-3, 6-dione, stigmasta-4, 22-dien-3-one, and campest-4-en-3-one were identified from natural products.