作者:Denis Barron、Ragai K. Ibrahim
DOI:10.1016/0031-9422(88)80166-3
日期:1988.1
Abstract One novel flavonoid sulphate ester and two known non-sulphated flavonoids were isolated from the leaves of Flaveria chloraefolia . The novel sulphated conjugate is 7,4′-dimethylquercetin (ombuin) 3-sulphate, and the known compounds are 6-methoxyquercetin and its 3-glucoside. The structure of ombuin 3-sulphate was established by UV spectroscopy, acid hydrolysis followed by EIMS of the aglycone, as
摘要 从绿叶黄花叶中分离得到一种新型黄酮硫酸酯和两种已知的非硫酸化黄酮。新型硫酸化偶联物是 7,4'-二甲基槲皮素 (ombuin) 3-硫酸盐,已知化合物是 6-甲氧基槲皮素及其 3-葡萄糖苷。ombuin 3-sulphate 的结构是通过紫外光谱法、酸水解和糖苷配基的 EIMS 以及酶促合成建立的。