InChI=1/C15H20O9/c1-22-9-6-7(4-5-16)2-3-8(9)23-15-12(19)10(17)11(18)13(24-15)14(20)21/h2-3,6,10-13,15-19H,4-5H2,1H3,(H,20,21)/t10-,11-,12+,13-,15+/s2