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A new oleanane triterpene was isolated from okara fermented with Penicillium simplicissimum ATCC 90288. Its structure was established to be 7β, 15α, 24-trihydroxyolean-12-en-3, 11, 22-trione by spectroscopic techniques and an X-ray crystallographic analysis.
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Hayashi et al. (1996) studied this question.
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