Caffeoyl derivatives of a sugar lactone and its hydroxy acid from the leaves of Bidens pilosa
作者:Kazunori Ogawa、Yutaka Sashida
DOI:10.1016/0031-9422(92)83752-k
日期:1992.10
Abstract A new sugar lactone derivative, 3-O-caffeoyl-2-C-methyl- d -erythrono-1,4-lactone, and three new hydroxy acid derivatives, 2-O-caffeoyl-2-C-methyl- d -erythronic acid, methyl 2-O-caffeoyl-2-C-methyl- d -erythronic acid, and methyl 3-O-caffeoyl-2-C-methyl- d -erythronic acid were isolated from the leaves of Bidens pilosa. Their structures were elucidated on the basis of chemical and spectral
摘要 一种新的糖内酯衍生物 3-O-caffeoyl-2-C-methyl-d-erythrono-1,4-lactone 和三种新的羟基酸衍生物 2-O-caffeoyl-2-C-methyl-d-从 Bidens pilosa 的叶子中分离出赤红酸、甲基 2-O-咖啡酰-2-C-甲基-d-赤红酸和甲基 3-O-咖啡酰-2-C-甲基-d-赤红酸。根据化学和光谱证据阐明了它们的结构。两种甲酯被认为是人工制品。