InChI=1/C13H15N2O4/c1-6-4-8(14-18-6)10-12(16)11(13(10,3)17)9-5-7(2)19-15-9/h4-5,10-12,17H,1-3H3/q-1/t10-,11+,12?,13? BDCBFBE7F642F829