[{"from": "human", "value": "Provide a description of this molecule. [C][C][=C][Branch1][=N][C][Branch1][=Branch1][C][C][C][Ring1][=Branch1][Branch1][C][C][C][/C][=C][/C][=Branch2][Ring2][O][=C][/C][=C][/C][=Branch2][Ring2][Ring1][=C][/C][=C][/C][=C][Branch2][Ring1][#Branch2][/C][=C][/C][=C][Branch2][Ring1][C][/C][=C][/C][=C][Branch1][O][C][C][C][C][Ring1][=Branch1][Branch1][C][C][C][C][\\C][\\C][/C][/C]"}, {"from": "gpt", "value": "The molecule is a cyclic carotene obtained by dimerisation of all-trans-retinol. A strongly-coloured red-orange pigment abundant in plants and fruit and the most active and important provitamin A carotenoid. It has a role as a biological pigment, a provitamin A, a plant metabolite, a human metabolite, a mouse metabolite, a cofactor, a ferroptosis inhibitor and an antioxidant. It is a cyclic carotene and a carotenoid beta-end derivative."}]