[{"from": "human", "value": "Create a molecule that satisfies the conditions outlined in the description. The molecule appears as a colorless gas with a faint garlic-like odor. Easily ignited and burns with a sooty flame. Gas is lighter than air. Flame may flash back to the source of a leak very easily. Under prolonged exposure to fire or heat the containers may rupture violently and rocket."}, {"from": "gpt", "value": "[C][#C]"}]