InChI=1S/C16H20O9/c1-2-16(15(22)23,8-6-4-3-5-7-8)25-14-11(19)9(17)10(18)12(24-14)13(20)21/h3-7,9-12,14,17-19H,2H2,1H3,(H,20,21)(H,22,23)