InChI=1S/C18H20O11/c19-9(3-1-8-2-4-10-11(5-8)27-7-26-10)6-12(20)28-18-15(23)13(21)14(22)16(29-18)17(24)25/h1-5,9,13-16,18-19,21-23H,6-7H2,(H,24,25)/b3-1-