Two novel metabolites of mixed biogenesis, polycerasoidin [1] and polycerasoidol [2], have been isolated from the stem bark of Polyalthia cerasoides. Their structures were established on the basis of nmr spectroscopic techniques, including 2D correlated nmr spectroscopy (COSY 45, HMQC, and HMBC).
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González et al. (1995) studied this question.