[{"from": "human", "value": "Describe this molecule. [C][C][=C][Branch1][P][C][Branch1][#Branch2][C][C@@H1][Branch1][Branch1][C][Ring1][=Branch1][=O][O][Branch1][C][C][C][/C][=C][/C][=Branch2][Ring2][P][=C][/C][=C][/C][=Branch2][Ring2][=Branch2][=C][/C][=C][/C][=C][Branch2][Ring1][S][/C][=C][/C][=C][Branch2][Ring1][Branch2][/C][=C][/C][=C][Branch1][P][C][=Branch1][C][=O][C@H1][Branch1][=Branch2][C][C][Ring1][#Branch1][Branch1][C][C][C][O][C][\\C][\\C][/C][/C]"}, {"from": "gpt", "value": "The molecule is a carotenone that consists of beta,beta-carotene-4,4'-dione bearing two hydroxy substituents at positions 3 and 3' (the 3S,3'S diastereomer). A carotenoid pigment found mainly in animals (crustaceans, echinoderms) but also occurring in plants. It can occur free (as a red pigment), as an ester, or as a blue, brown or green chromoprotein. It has a role as an anticoagulant, an antioxidant, a food colouring, a plant metabolite and an animal metabolite. It is a carotenone and a carotenol. It derives from a hydride of a beta-carotene."}]