C7H7O4
APtclcactv03241713302D 0   0.00000     0.00000
 
 18 18  0  0  0  0  0  0  0  0999 V2000
    2.8660    0.3450    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    2.0000   -0.1550    0.0000 O   0  5  0  0  0  0  0  0  0  0  0  0
    2.8660    1.3450    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    3.7321   -0.1550    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    3.7321   -1.1550    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    4.5981   -1.6550    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    5.4641   -1.1550    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    5.4641   -0.1550    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    4.5981    0.3450    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    4.5981    1.3450    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    6.3301    0.3450    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    3.1951   -1.4650    0.0000 H   0  0  0  0  0  0  0  0  0  0  0  0
    4.5981   -2.2750    0.0000 H   0  0  0  0  0  0  0  0  0  0  0  0
    6.0010   -1.4650    0.0000 H   0  0  0  0  0  0  0  0  0  0  0  0
    5.4641    0.4650    0.0000 H   0  0  0  0  0  0  0  0  0  0  0  0
    5.1350    0.6550    0.0000 H   0  0  0  0  0  0  0  0  0  0  0  0
    5.1350    1.6550    0.0000 H   0  0  0  0  0  0  0  0  0  0  0  0
    6.8671    0.0350    0.0000 H   0  0  0  0  0  0  0  0  0  0  0  0
  1  2  1  0  0  0  0
  1  3  2  0  0  0  0
  1  4  1  0  0  0  0
  4  5  2  0  0  0  0
  5  6  1  0  0  0  0
  6  7  2  0  0  0  0
  7  8  1  0  0  0  0
  8  9  1  0  0  0  0
  4  9  1  0  0  0  0
  9 10  1  0  0  0  0
  8 11  1  0  0  0  0
  5 12  1  0  0  0  0
  6 13  1  0  0  0  0
  7 14  1  0  0  0  0
  8 15  1  0  0  0  0
  9 16  1  0  0  0  0
 10 17  1  0  0  0  0
 11 18  1  0  0  0  0
M  CHG  1   2  -1
M  END
> <UNIQUE_SMILES>
OC1C=CC=C(C1O)C([O-])=O

> <USER_SUPPLIED_SMILES>
C([O-])(=O)C1(=CC=CC(C1O)O)

$$$$
