[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is an isothiocyanate having a phenyl group attached to the nitrogen; used for amino acid sequencing in the Edman degradation. It has a role as an allergen and a reagent."}, {"from": "gpt", "value": "[C][=C][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][N][=C][=S]"}]