Journal of Natural Products 2007-May
Sulfur-containing spiroketal glycosides from Breynia fruticosa.
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Phytochemical investigation of the chemical constituents of the aerial parts of Breynia fruticosa afforded 10 sulfur-containing spiroketal glycosides, including eight new compounds (1-8) and two known compounds, epibreynin B (9) and breynin B (10). Epibreynin B (9) was previously reported as a semisynthetic oxidation product of breynin A and is now reported from a natural source for the first time. The structures of 1-10 were determined on the basis of spectroscopic and chemical methods.