Six new glycosidic constituents (1–6), together with 10 known analogs, have been isolated from the bark of Machilus robusta. Structures of the new compounds, including the absolute configurations, were determined by spectroscopic and chemical methods as ( − )-nectandrin B-β-d-glucopyranoside (1), ( − )-(7R,7′R,8S,8′R)-4,4′-dihydroxy-3,3′-dimethoxy-7,7′-epoxylignan-4-O-β-d-glucopyranoside (2), ( − )-(7R
六个新的糖苷组分(1 - 6),用10个已知类似物一起,已经从树皮中分离润罗布斯塔。( - )的新化合物的结构,包括绝对构型,通过光谱和
化学方法作为确定-nectandrin B-β- d
吡喃
葡萄糖苷(1),( - ) - (7 - [R,7' - [R,8小号, 8' - [R)-4,4'-二羟基-3,3'-二甲氧基- 7,7'- epoxylignan -4- ö -β- d
吡喃
葡萄糖苷(2),( - ) - (7 - [R,7' - [R,8 S,8′R)-4,4'-二羟基-3,3'-二甲氧基- 7,7'- epoxylignan -4'- ö -β- d
吡喃
葡萄糖苷(3),( - ) - (8小号,8' - [R ) - 4,4'-二羟基-3,3',5'- trimethoxylignan -4'- ö -β- d
吡喃
葡萄糖苷(4),( - ) - (7 - [R,8 - [R)-syringylglycerol