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