InChI=1S/C15H20O9/c1-3-6-4-7(16)12(8(5-6)22-2)23-15-11(19)9(17)10(18)13(24-15)14(20)21/h4-5,9-11,13,15-19H,3H2,1-2H3,(H,20,21)