[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is a tertiary phosphine and a member of diphosphanes. It has a role as an allergen."}, {"from": "gpt", "value": "[C][=C][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][P][Branch2][Ring1][=Branch1][C][C][P][Branch1][=Branch2][C][=C][C][=C][C][=C][Ring1][=Branch1][C][=C][C][=C][C][=C][Ring1][=Branch1][C][=C][C][=C][C][=C][Ring1][=Branch1]"}]