RDKit          

  2  0  0  0  0  0  0  0  0  0999 V2000
    0.0000    0.0000    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.0000    0.0000    0.0000 Nb  0  0  0  0  0 15  0  0  0  0  0  0
M  END
> <PUBCHEM_COMPOUND_CID>
159431

> <NAME>
methane- niobium(1:1)


$$$$