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Stereumins H (1), I (2), and J (3), three sesquiterpenes possessing a novel stereumane-type backbone, were isolated from an extract of culture broth of the Basidiomycete Stereum sp. CCTCC AF 207024. The complete structural assignments including the absolute configurations are reported by using X-ray studies and density functional theory at the B3LYP/aug-cc-pVDZ//B3LYP/6-31G(d) level.
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Li et al. (2011) studied this question.
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