Cyaonoside A

3-O-β-D-Glucopyranosyl (1→2) -[α-L-rhamnopyranosyl (1→3) ]-β-D-glucopyranosyl 28-O-β-D-glucuronopyranoside is a saponin compound extracted from Polaskia chichipe Backbg. It shows an 84.2% inhibitory activity on melanin biosynthesis at a concentration of 100μM in B16 melanoma cells[1].

C(O[C@@H]1O[C@H](CO)[C@@H](O)[C@H](O)[C@H]1O)(=O)[C@]23[C@](C=4[C@@](C)(CC2)[C@@]5(C)[C@](CC4)([C@]6(C)[C@@](CC5)(C(C)(C)[C@@H](O[C@H]7[C@H](O[C@@H]8O[C@H](CO)[C@@H](O)[C@H](O)[C@H]8O)[C@@H](O[C@H]9[C@H](O)[C@H](O)[C@@H](O)[C@H](C)O9)[C@H](O)[C@@H](C(O)=O)O7)CC6)[H])[H])(CC(C)(C)CC3)[H]