Structures of compounds: parvifloside (1), protodeltonin (2), protodioscin (3), protobioside (4), huangjiangsu A (5), pseudoprotodioscin (6), 26-O-β-D-glucopyranosyl-3β,26-diol-25(R)-furost-5,20(22)-dien-3-O-α-L-rhamnopyranosyl(1→2)-O-β-D-glucopyranoside (7), zingiberensis saponin I (8), deltonin (9), dioscin (10), progenin III (11), diosgenin (12)