InChI=1S/C15H16O13/c16-4-1-3(6(18)8(20)7(4)19)2-5(17)14(26)28-15-11(23)9(21)10(22)12(27-15)13(24)25/h1,9-12,15-16,18-23H,2H2,(H,24,25)