InChI=1/C18H20N2O4/c1-22-15-9-8-14(10-16(15)23-2)11-17(19)20-24-18(21)12-13-6-4-3-5-7-13/h3-10H,11-12H2,1-2H3,(H2,19,20)/p+1/fC18H21N2O4/h20H,19H2/q+1 36740AE84B4332DF