InChI=1S/C19H15NO8/c1-25-16-4-10(19(24)20-7-17(22)23)2-9-3-13(28-18(9)16)11-5-14-15(6-12(11)21)27-8-26-14/h2-6,21H,7-8H2,1H3,(H,20,24)(H,22,23)