InChI=1/C15H14N2O3/c18-14-9-8-13(17(19)20)15(16-14)12-7-3-5-10-4-1-2-6-11(10)12/h1-7,13,15H,8-9H2,(H,16,18)/t13-,15-/m0/s1/f/h16H C972BF5D3BCDED84