InChI=1/C15H12N2O4/c18-14-12-8-1-2-9(7-8)13(12)15(19)16(14)10-3-5-11(6-4-10)17(20)21/h1-6,8-9,12-13H,7H2/t8-,9+,12+,13-	1E69203D2587E56F