[{"from": "human", "value": "Please give me some details about this molecule. [Be+2].[O-1][S][=Branch1][C][=O][=Branch1][C][=O][O-1]"}, {"from": "gpt", "value": "The molecule is a metal sulfate in which the metal is beryllium (in the +2 oxidation state) and the ratio of beryllium to sulfate is 1:1. It has a role as an allergen. It contains a beryllium(2+)."}]