The structure of sanggenon A, which has been isolated from the Chinese m d e drug "Sang-Bai-Pi", was revised on the basis of two-dimentianal NMR spectroscopic and chemical evidence.Sanggenon A is a unique 3-hydroxyflavanone derivative bearing an isoprenyl group at the C-2 position of the skeleton.The other flavanones having sanggenon A-type structure, including sanggenons M and C, also required the revision of the structure.12.
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Nomura et al. (1997) studied this question.
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