CH?3O
APtclcactv03241713452D 0   0.00000     0.00000
 
  6  5  0  0  0  0  0  0  0  0999 V2000
    2.8660    0.0000    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    2.0000   -0.5000    0.0000 R2  0  0  0  0  0  0  0  0  0  0  0  0
    3.7321    0.5000    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    2.3660    0.8660    0.0000 R3  0  0  0  0  0  0  0  0  0  0  0  0
    3.3660   -0.8660    0.0000 R1  0  0  0  0  0  0  0  0  0  0  0  0
    4.2690    0.1900    0.0000 H   0  0  0  0  0  0  0  0  0  0  0  0
  1  2  1  0  0  0  0
  1  3  1  0  0  0  0
  1  4  1  0  0  0  0
  1  5  1  0  0  0  0
  3  6  1  0  0  0  0
A    2
R2
A    4
R3
A    5
R1
M  END
> <UNIQUE_SMILES>
C(O)([R2])([R3])[R1]

> <USER_SUPPLIED_SMILES>
C([R2])(O)([R3])[R1]

$$$$
