Chemical constituents from canes of Schisandra sphenanthera / 中草药

ABSTRACT

Objective: To investigate the chemical constituents from the canes of Schisandra sphenanthera. Methods: The compounds were isolated and purified by chromatography on silica gel. Their structures were elucidated on the basis of spectroscopic methods, including MS, 1D, and 2D NMR spectral techniques. Results: Thirteen compounds were isolated from 95% ethanol extract in the canes of S. sphenanthera, including six lignans, six triterpenes, and one steroid and their structures were identified as sphendilactone (1), kadsulactone (2), schisanlactone E (3), 12-β-hydroxycoccinic acid (4), schizandronic acid (5), schisanbilactone A (6), β-sitosterol (7), meso-dihydroguaiaretic acid (8), deoxychizandrin (9), schizantherin A (10), schisanhenol B (11), γ-schizandrin (12), and R-(+)-angeloygomisin M1 (13). Conclusion: Among them, one new triterpene is named as sphendilactone (1). Schisanhenol B, deoxychizandrin, R-(+)-angeloygomisin M1, kadsulactone, schisanlactone E, 12β-hydroxycoccinic acid, and schisanbilactone A are isolated from this plant for the first time.