O=C(O)c1ccccc1/N=C/C=C/c1ccccc1    mol15481    0_1
O=C([O-])c1ccccc1/[NH+]=C/C=C/c1ccccc1    mol15481    0_2
O=C(O)c1ccccc1/[NH+]=C/C=C/c1ccccc1    mol15481    1_1