HMDB0249629
     RDKit          3D
Methylene
  3  2  0  0  0  0  0  0  0  0999 V2000
   -0.0043    0.4404   -0.0000 C   0  0  0  0  0  2  0  0  0  0  0  0
   -0.8927   -0.2219   -0.0000 H   0  0  0  0  0  0  0  0  0  0  0  0
    0.8970   -0.2186    0.0000 H   0  0  0  0  0  0  0  0  0  0  0  0
  1  2  1  0
  1  3  1  0
M  RAD  1   1   3
M  END