InChI=1/C17H12O4/c18-14-8-10(9-15(19)20)7-12-6-5-11-3-1-2-4-13(11)17(21)16(12)14/h1-8,18H,9H2,(H,19,20)/p-1/fC17H11O4/q-1 F874BD14AF5E49C2