[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is an ammonium ion obtained by protonation of the amino group of (2R)-1-aminopropan-2-ol. It is a conjugate acid of a (2R)-1-aminopropan-2-ol."}, {"from": "gpt", "value": "[C][C@H1][Branch1][Ring1][C][NH3+1][O]"}]