O=C(/C=C/c1ccc(O[C@H]2O[C@@H](CO)[C@H](O)[C@@H](O)[C@@H]2O)c(O)c1)O[C@H]1[C@H](O)C[C@@](O)(C(=O)O)C[C@H]1O	(-)-4-O-(4-O-beta-D-glucopyranosylcaffeoyl)quinic acid