InChI=1S/C21H20O12/c22-7-1-3-9-11(5-7)31-18-8-2-4-10(12(23)16(8)30-6-21(9,18)29)32-20-15(26)13(24)14(25)17(33-20)19(27)28/h1-5,13-15,17-18,20,22-26,29H,6H2,(H,27,28)