CCOC(=O)c1c([O-])n[nH+]n1Cc1ccccc1    mol19913    0_1
CCOC(=O)c1c(O)nnn1Cc1ccccc1    mol19913    0_2
CCOC(=O)c1c([O-])nnn1Cc1ccccc1    mol19913    -1_1