InChI=1S/C15H16O12/c16-5-1-4(2-6(17)13(22)23)3-7(8(5)18)26-15-11(21)9(19)10(20)12(27-15)14(24)25/h1,3,9-12,15-16,18-21H,2H2,(H,22,23)(H,24,25)