Studies on the Constituents of Broussonetia Species. II. Six New Pyrrolidine Alkaloids, Broussonetine A, B, E, F and Broussonetinine A and B, as Inhibitors of Glycosidases from Broussonetia kazinoki SIEB.
作者:Makio SHIBANO、Satoshi KITAGAWA、Satoko NAKAMURA、Naomi AKAZAWA、Genjiro KUSANO
DOI:10.1248/cpb.45.700
日期:——
Six new pyrrolidine alkaloids called broussonetine A, B, E, F, and broussonetinine A and B were isolated from the branches of Broussonetia kazinoki SIEB. (Moraceae). Broussonetine A, B, E and F were formulated as 2β-hydroxymethyl-3β-hydroxy-5α-(10-oxo-13-hydroxytridecyl)-pyrrolidine-4-O-β-D-glucopyranoside (1), 2β-hydroxymethyl-3β-hydroxy-5α-(9-oxo-13-hydroxytridecyl)-pyrrolidine-4-O-β-D-glucopyranoside (2), 2β-hydroxymethyl-3α, 4β-dihydroxy-5α-(1, 13-dihydroxy-10-oxo-tridecyl)-pyrrolidine (3), and 2β-hydroxymethyl-3α, 4β-dihydroxy-5α-(1, 13-dihydroxy-9-oxo-tridecyl)-pyrrolidine (4), respectively. Broussonetinine A and B (5 and 6) were also isolated and identified as the aglycones of 1 and 2. 3 and 4 exhibited a strong inhibition of α-glucosidase, β-glucosidase, β-galactosidase and β-mannosidase, while 5 and 6 showed a strong inhibition of β-galactosidase and α-mannosidase.
从构树 SIEB 的枝条中分离出 6 种新的吡咯烷生物碱,称为构树碱 A、B、E、F 和构树碱 A 和 B。 (桑科)。构树碱 A、B、E 和 F 被配制成 2β-羟甲基-3β-羟基-5α-(10-氧代-13-羟基十三烷基)-吡咯烷-4-O-β-D-吡喃葡萄糖苷 (1)、2β-羟甲基- 3β-羟基-5α-(9-氧代-13-羟基十三烷基)-吡咯烷-4-O-β-D-吡喃葡萄糖苷 (2), 2β-羟甲基-3α, 4β-二羟基-5α-(1, 13-二羟基-分别为10-氧代-十三烷基)-吡咯烷(3)和2β-羟甲基-3α,4β-二羟基-5α-(1, 13-二羟基-9-氧代-十三烷基)-吡咯烷(4)。构树宁 A 和 B(5 和 6)也被分离并鉴定为 1 和 2 的苷元。3 和 4 对 α-葡萄糖苷酶、β-葡萄糖苷酶、β-半乳糖苷酶和 β-甘露糖苷酶表现出强烈的抑制作用,而 5 和 6对β-半乳糖苷酶和α-甘露糖苷酶有很强的抑制作用。