[{"from": "human", "value": "Create a molecule that satisfies the conditions outlined in the description. The molecule is a member of the class of coumarins that is coumarin in which the hydrogen at position 3 is replaced by an acetyl group."}, {"from": "gpt", "value": "[C][C][=Branch1][C][=O][C][=C][C][=C][C][=C][C][=C][Ring1][=Branch1][O][C][Ring1][#Branch2][=O]"}]