User: I'm looking for the SMILES of a molecule that can be described as:
The molecule is zwitterionic form of S-adenosyl-L-homocysteine arising from migration of a proton from the carboxy group to the alpha-amino group; major species at pH 7.3. It is a tautomer of a S-adenosyl-L-homocysteine.
Assistant: This is a molecule that fits your description: Nc1ncnc2c1ncn2[C@@H]1O[C@H](CSCC[C@H]([NH3+])C(=O)[O-])[C@@H](O)[C@H]1O
User: I'm {#searching|looking!} for the {SMILES__description} of a molecule that can be described {#by|as!}:
{description#}
Assistant: This is a molecule that fits {#your|this!} description: {SMILES#}
(2S)-4-[[(2S,3S,4R,5R)-5-(6-aminopurin-9-yl)-3,4-dihydroxyoxolan-2-yl]methylsulfanyl]-2-azaniumylbutanoate
The molecule is zwitterionic form of S-adenosyl-L-homocysteine arising from migration of a proton from the carboxy group to the alpha-amino group; major species at pH 7.3. It is a tautomer of a S-adenosyl-L-homocysteine.