[{"from": "human", "value": "Use the given information to create a molecule that fulfills the desired purpose. The molecule is major microspecies at pH 7.3. It is a conjugate acid of an O-(2-aminoethyl)-L-serine."}, {"from": "gpt", "value": "[C][Branch1][=N][C][O][C][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O-1][NH3+1][NH3+1]"}]