[{"from": "human", "value": "Use the given information to create a molecule that fulfills the desired purpose. The molecule is a chemical compound of cobalt. Cobalt(II) acetate is the cobalt(II) salt of acetic acid. It may also be found as the tetrahydrate. Cobalt is a metallic element with the atomic number 27. It is found naturally in rocks, soil, water, plants, and animals. In small amounts cobalt is an essential element for life, as it is part of vitamin B12. However, excess exposure is known to exhibit toxic effects. (L29, L30)"}, {"from": "gpt", "value": "[C][C][=Branch1][C][=O][O-1].[C][C][=Branch1][C][=O][O-1].[Co+2]"}]