[{"from": "human", "value": "Provide a description of this molecule. [O][=Sn]"}, {"from": "gpt", "value": "The molecule is an oxide of tin. It is used as a precursor in manufacturing of other, typically divalent, tin compounds or salts, and as a reducing agent and in the creation of ruby glass. Tin is a chemical element with the symbol Sn and atomic number 50. It is a natural component of the earth's crust and is obtained chiefly from the mineral cassiterite, where it occurs as tin dioxide. (L307, L309, L321)"}]