[{"from": "human", "value": "Could you give me a brief overview of this molecule? [C][=Branch1][C][=O][Branch1][C][O-1][O-1].[Ca+2]"}, {"from": "gpt", "value": "The molecule is an inorganic salt used as an antacid. It is a basic compound that acts by neutralizing hydrochloric acid in gastric secretions. Subsequent increases in pH may inhibit the action of pepsin. An increase in bicarbonate ions and prostaglandins may also confer cytoprotective effects. Calcium carbonate may also be used as a nutritional supplement or to treat hypocalcemia."}]