[O-]C(O)=C(O)c1ccccc1    mol14116    -1_1
[O-]C(=C(O)O)c1ccccc1    mol14116    -1_2
[O-]C(O)=C([O-])c1ccccc1    mol14116    -2_1
[O-]C([O-])=C(O)c1ccccc1    mol14116    -2_2