[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is under investigation in clinical trial NCT01677338 (Phase 2 Study to Evaluate the Preliminary Performance of the C13-URA Breath Test Kit in Dyspeptic Subjects)."}, {"from": "gpt", "value": "[C][=C][N][13C][=Branch1][C][=O][N][C][Ring1][#Branch1][=O]"}]