Triple bonds (#) in SMILES in pubchem_atoms_search not supported.
In ASE version 3.22.1, smiles with tiple bonds, like CC#N, does not work, but CC%23N does work. %23 is hex for #.
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In ASE version 3.22.1, smiles with tiple bonds, like CC#N, does not work, but CC%23N does work. %23 is hex for #.