[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is a polybromodiphenyl ether that is diphenyl ether in which the hydrogens at the 2, 4, 3', and 4' positions have been replaced by bromines."}, {"from": "gpt", "value": "[C][=C][C][=Branch2][Ring1][=Branch2][=C][Branch2][Ring1][Ring2][C][=C][Ring1][=Branch1][O][C][=C][Branch1][#Branch2][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][Br][Br][Br][Br]"}]