[{"from": "human", "value": "Please give me some details about this molecule. [C][C][Branch1][C][C][C][C@@H1][Branch2][Ring1][Ring2][C][=Branch1][C][=O][N][C@@H1][Branch1][#Branch1][C][C][Branch1][C][C][C][C][=Branch1][C][=O][O-1][NH3+1]"}, {"from": "gpt", "value": "The molecule is an L-aminoacyl-L-amino acid zwitterion resulting from transfer of a proton from the carboxy to the amino group of L-leucyl-L-leucine; major species at pH 7.3. It is a tautomer of a Leu-Leu."}]