Ganorbifate A featuring an unprecedented 6/6/6/5/5 pentacyclic system, and ganorbifate B with an unusual 6/4/6/5/8/5 ring system were isolated from the fruiting body of Ganoderma orbiforme. Their structures were established using extensive spectroscopic analysis, including DFT calculations of NMR data and ECD spectra.
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Yin et al. (2020) studied this question.
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