[{"from": "human", "value": "Describe this molecule. [C][N][Branch1][C][C][Sb][Branch1][=Branch1][N][Branch1][C][C][C][N][Branch1][C][C][C]"}, {"from": "gpt", "value": "The molecule is a chemical compound of antimony. Antimony is a metallic element with the chemical symbol Sb and atomic number 51. Small amounts of antimony are found in the earth's crust. (L741, L808)"}]