InChI=1S/C15H18O11/c1-23-6-4-3-5(7(16)11(6)24-2)14(22)26-15-10(19)8(17)9(18)12(25-15)13(20)21/h3-4,8-10,12,15-19H,1-2H3,(H,20,21)