loop_
    _pdbx_chem_comp_descriptor.comp_id
    _pdbx_chem_comp_descriptor.descriptor
    _pdbx_chem_comp_descriptor.type
    _pdbx_chem_comp_descriptor.program
    _pdbx_chem_comp_descriptor.program_version
     ATP       c1nc(c2c(n1)n(cn2)C3C(C(C(O3)COP(=O)(O)OP(=O)(O)OP(=O)(O)O)O)O)N
           SMILES           OPENEYE  1.5.0