NEW MATERIAL:A compound shown by the formula [R1 is H; R2 is beta-D-glucopyranosyl, beta-D-xylopyranosyl(1 6)-beta-D-glucopyranosyl, alpha-L-rhamnopyranosyl (1 6)-beta-D-glucopyranosyl; R3 is H, or OH]. EXAMPLE:20S-Protopanaxadiol-3-O-{[ beta-D-glucopyranosyl( 1 2 )-alpha-L-rhamnopyranosyl(1 6) ]-beta-D-glucopyranoside }-20-O-[ beta-D-glucopyranosyl(1 6)-beta-D-glucopyranoside]. USE:An inhibitor for lipid decomposition and an inhibitor for lipid synthesis. PROCESS:Gynostemma pentaphyllum Makino is extracted with water or a water- containing lower alcohol, the alcohol is optionally removed, it is treated with a nonionic absorbing resin. The absorbed saponin is eluted with a lower alcohol, treated with alumina, eluted with the (water-containing) lower alcohol, concentrated, to give crude saponins, which are separated and purified.
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机译：新材料：式[R 1]所示的化合物为H; R 2为β-D-吡喃葡萄糖基，β-D-吡喃吡喃糖基（1 6）-β-D-吡喃葡萄糖基，α-L-鼠李糖基吡喃糖基（1 6）-β-D-吡喃葡萄糖基。 R 3为H或OH]。实例：20S-原人参二醇-3-O-{[β-D-吡喃葡糖基（1 6）-α-L-鼠李糖吡喃糖基（1 6）]-β-D-吡喃葡糖苷} -20-O- [β-D-吡喃葡糖基（1 6）-β-D-吡喃葡萄糖苷]。用途：脂质分解抑制剂和脂质合成抑制剂。工艺：绞股蓝（Gynostemma pentaphyllum Makino）用水或含水的低级醇提取，可选择性除去醇，然后用非离子吸收性树脂处理。吸收的皂苷用低级醇洗脱，用氧化铝处理，用（含水的）低级醇洗脱，浓缩，得到粗皂苷，将其分离并纯化。
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