[{"from": "human", "value": "Provide a brief overview of this molecule. [C][/C][=C][Branch1][C][\\C][/C][=C][/C][=C][Branch1][C][\\C][/C][=C][/C][=C][Branch1][O][C][C][C][C][Ring1][=Branch1][Branch1][C][C][C][C]"}, {"from": "gpt", "value": "The molecule is a diterpene that is cyclohexene substituted by a (1Z,3E,5E,7E)-3,7-dimethylnona-1,3,5,7-tetraen-1-yl group at position 2 and by methyl groups at positions 1,3 and 3. It is the parent hydrocarbon on which Vitamin A and other retinoids are based. It is a diterpene and a polyene."}]