摘要：

The structure of aceroside I, C_H_O_8,mp 170-171°(acetone), [α]^_D-7.7°, which was isolated from the stem bark of Acer nikoense MAXIM. (Aceraceae), was established to be acerogenin A β-D-glucopyranoside represented by formula 1. Acerogenin A, C_H_O_3,mp 151-152°, [α]^_D+57.3°, was concluded to be a m-, p'-bridged diphenyl ether type diarylheptanoid (2) on the basis of chemical and spectroscopic (especially NMR) evidences. The stereostructure of 2 was determined by derivation of acerogenin A (2) into (S)-1-(p-hydroxyphenyl)-7-(p-methoxyphenyl)-heptan-3-ol. Acerogenin A (2) is the first example of a novel type of diarylheptanoid-20-oxa-[7,1]-metapara-cyclophane.

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