InChI=1/C15H14N2O3/c18-11-6-8-14(15(9-11)17(19)20)16-13-7-5-10-3-1-2-4-12(10)13/h1-4,6,8-9,13,16,18H,5,7H2/t13-/m1/s1 570B44BF91F3A6E8