Cc1cc(O)n(O)c(=O)c1C    mol31409    0_1
Cc1cc(O)n([O-])c(=O)c1C    mol31409    -1_1
Cc1cc([O-])n(O)c(=O)c1C    mol31409    -1_2
Cc1cc([O-])n([O-])c(=O)c1C    mol31409    -2_1