O4P
APtclcactv03241713332D 0   0.00000     0.00000
 
  5  4  0  0  0  0  0  0  0  0999 V2000
    3.7321    0.5000    0.0000 O   0  5  0  0  0  0  0  0  0  0  0  0
    2.8660    0.0000    0.0000 P   0  0  0  0  0  0  0  0  0  0  0  0
    2.0000   -0.5000    0.0000 O   0  5  0  0  0  0  0  0  0  0  0  0
    2.3660    0.8660    0.0000 O   0  5  0  0  0  0  0  0  0  0  0  0
    3.3660   -0.8660    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
  1  2  1  0  0  0  0
  2  3  1  0  0  0  0
  2  4  1  0  0  0  0
  2  5  2  0  0  0  0
M  CHG  3   1  -1   3  -1   4  -1
M  END
> <UNIQUE_SMILES>
[O-][P]([O-])([O-])=O

> <USER_SUPPLIED_SMILES>
[O-]P([O-])([O-])=O

$$$$
