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