InChI=1S/C19H15NO9/c1-28-18-16(26)15-12(23)5-9(21)6-13(15)29-17(18)8-2-3-10(11(22)4-8)19(27)20-7-14(24)25/h2-6,21-23H,7H2,1H3,(H,20,27)(H,24,25)