InChI=1S/C15H18O9/c16-6-2-4-7-3-1-5-8(9(7)17)23-15-12(20)10(18)11(19)13(24-15)14(21)22/h1,3,5-6,10-13,15,17-20H,2,4H2,(H,21,22)