InChI=1S/C13H12O13/c14-2-1-3(24-8(4(2)15)10(19)20)12(23)26-13-7(18)5(16)6(17)9(25-13)11(21)22/h1,5-7,9,13,15-18H,(H,19,20)(H,21,22)