The structures of orientin and iso-orientin have been investigated by periodic acid and ferric chloride oxidation of the tetra-O-methyl derivatives and by identification of the products of oxidation. 2. The preparation and properties of the 3',4',7-trimethyl ethers of orientin and iso-orientin are described, and the nuclear-magnetic-resonance spectra of orientin, iso-orientin and their tri- and tetra-O-methyl derivatives are discussed. 3. Orientin and iso-orientin are formulated as 8- and 6-C-beta-d-glucopyranosyl-luteolin respectively.
摘要
已通过对四 - O - 甲基衍生物进行高碘酸和氯化铁氧化以及对氧化产物进行鉴定,研究了荭草苷和异荭草苷的结构。2. 描述了荭草苷和异荭草苷的3',4',7 - 三甲醚的制备方法及其性质,并讨论了荭草苷、异荭草苷及其三 - 和四 - O - 甲基衍生物的核磁共振谱。3. 荭草苷和异荭草苷分别被确定为8 - C - β - D - 吡喃葡萄糖基木犀草素和6 - C - β - D - 吡喃葡萄糖基木犀草素。