InChI=1S/C15H18O12/c1-25-6-3-4(2-5(16)8(6)18)7(17)14(24)27-15-11(21)9(19)10(20)12(26-15)13(22)23/h2-3,7,9-12,15-21H,1H3,(H,22,23)