Soyasaponin Ac;3-O-(α-L-Rhamnopyranosyl(1->2)-β-D-galactopyranosyl(1->2)-β-D-glucuronopyranosyl)-22-O-(2,3,4,6-tetra-O-acetyl-β-D-glucopyranosyl(1->3)-α-L-arabinopyranosyl)-soyasapogenol A;3-O-[α-L-Rhamnopyranosyl(1->2)-β-D-galactopyranosyl(1->2)-β-D-glucuronopyranosyl]-22-O-[2,3,4,6-tetra-O-acetyl-β-D-glucopyranosyl(1->3)-α-L-arabinopyranosyl]-soyasapogenol A;Soyosaponin Ac