InChI=1S/C21H20O12/c22-5-14-17(28)19(30)20(31)21(33-14)16-11(27)4-13-15(18(16)29)10(26)3-12(32-13)6-1-8(24)9(25)2-7(6)23/h1-4,14,17,19-25,27-31H,5H2/t14-,17-,19+,20-,21?/m1/s1