[{"from": "human", "value": "Describe this molecule. [C][C][Branch2][Ring1][C][C][O][C][C][O][C][Branch1][C][C][C][O][C][C][Branch1][C][C][N][N]"}, {"from": "gpt", "value": "The molecule is a diamine in which two primary amino groups are at either end of what is essentially a poly(ethylene glycol) (PEG)backbone, consisting of blocks of ethylene oxide and propylene oxide. In the diagram, m ~ 39,; (l + n) ~ 6. The compound is one of a series of related compounds commonly used to crystallise proteins. It has a role as a crystallisation adjutant. It is a jeffamine diamine, a diamine and a polyether."}]