[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is an alkyl diphosphate having bromohydrin as the alkyl group. It has a role as a phosphoantigen. It is an alkyl diphosphate and an organobromine compound."}, {"from": "gpt", "value": "[C][C][Branch2][Ring1][Ring2][C][C][O][P][=Branch1][C][=O][Branch1][C][O][O][P][=Branch1][C][=O][Branch1][C][O][O][Branch1][Ring1][C][Br][O]"}]