InChI=1S/C16H18O12/c1-25-7-3-5(13(20)21)6(4-8(7)26-2)15(24)28-16-11(19)9(17)10(18)12(27-16)14(22)23/h3-4,9-12,16-19H,1-2H3,(H,20,21)(H,22,23)