Two antifungal lanostane-type triterpene oligosides, named echinosides A (11) and B (9), were isolated from the sea cucumber Actinopyga echinites (JAEGER) collected in Okinawa Prefecture. On the basis of chemical and physicochemical evidence, the structures of echinosides A and B have been elucidated respectively as 3-O-[β-D-3-O-methylglucopyranosyl (1→3)-β-D-glucopyranosyl-(1→4)-β-D-quinovopyranosyl (1→2)-β-D-(4-O-sodiosulfonato) xylopyranosyl]-3β, 12α, 17α, 20 (S)-tetrahydroxy-lanost-9 (11)-en-18, 20-olide (11) and 3-O-[β-D-quinovopyranosyl (1→2)-β-D-(4-O-sodiosulfonato) xylopyranosyl]-3β, 12α, 17α, 20 (S)-tetrahydroxylanost-9 (11)-en-18, 20-olide (9). The antifungal activities of echinosides and allied compounds are discussed.
从日本冲绳县采集的海参Actinopyga echinites(JAeger)中分离得到两种抗真菌
羊毛甾烷型三萜
寡糖苷,分别命名为echinosides A(11)和B(9)。根据
化学和物理
化学证据,解析出echinosides A和B的结构分别为3-O-[β-D-3-O-
甲基葡萄糖吡喃糖基(1→3)-β-
D-葡萄糖吡喃糖基(1→4)-β-D-栀子糖
吡喃糖基(1→2)-β-D-(4-O-
钠磺酸基)
木糖吡喃糖基]-3β,12α,17α,20(S)-四羟基-羊毛甾-9(11)-
烯-18,20-内
酯(11)和3-O-[β-D-栀子糖
吡喃糖基(1→2)-β-D-(4-O-
钠磺酸基)
木糖吡喃糖基]-3β,12α,17α,20(S)-四羟基羊毛甾-9(11)-
烯-18,20-内
酯(9)。讨论了echinosides及其相关化合物的抗真菌活性。