Abstract
Two new norsesquiterpenoids, oxyphyllenotriol A (1) and oxyphyllone G (2), and two new sesquiterpenoids, oxyphyllol D (3) and oxyphyllol E (4), together with two known compounds (5, 6) were isolated from the fruits of Alpinia oxyphylla. Their structures were determined on the basis of spectroscopic analysis, including high resolution electrospray ionization mass spectrometry (HR-ESI-MS), 1D- and 2D-NMR, and the absolute configurations of 2 and 4 were determined by theoretical calculation of electronic circular dichroism (ECD) and comparison with the experimental ECD spectra.
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