Hello, I have a question about AllChem.ReplaceSubstructs(mol, query,replacement). As I understand, it replaces 'query' pattern in 'mol' by 'replacement' fragment. It is clear which atom from 'mol' is the joining atom, but which is the joining atom in 'replacement'? The atom with index=0? Is it possible to specify which atom in the 'replacement' should be bonded to 'mol'? It would be lovely to be able to do so, because the only alternative (using reaction SMARTS) is much, much slower. If not, is it possible to generate (from a given Mol object) a SMILES string starting from the specified atom index?
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