Thanks for the VERY rapid response, Greg (it makes me think you have a
pro-forma to answer SMARTS-related questions)! 

Greg wrote:
> If you see anything different, I would certainly like to know 
> about it. In that case, please let me know which version of 
> the RDKit on which platform.

I see the same (as you probably expected!).  However, what I probably
should have said to start with is that I am bringing my molecules in
using an SD supplier.  So:

p = Chem.MolFromSmarts('[2#1,3#1]')
suppl = Chem.SDMolSupplier(myfile)
for mol in suppl:
  mol.HasSubstructMatch(p)

Gives me a long list of 'False's.  But your reply got me thinking, so
doing the following actually gives the matching as expected:


p = Chem.MolFromSmarts('[2#1,3#1]')
suppl = Chem.SDMolSupplier(myfile)
for mol in suppl:
  newMol = Chem.MolToSmiles(mol, True)
  newMol = Chem.MolFromSmiles(newMol)
  newMol.HasSubstructMatch(p)


The SDF I am using was generated by RDKit via reaction enumeration.  I'm
confused!

James


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