InChI=1S/C19H18O9/c20-7-13-16(23)17(24)18(25)19(28-13)26-8-4-5-11-9(6-8)15(22)14-10(21)2-1-3-12(14)27-11/h1-6,13,16-21,23-25H,7H2/t13-,16+,17+,18-,19-/m1/s1