[{"from": "human", "value": "What can you tell me about this molecule? [C][C][=C][Branch2][Branch1][Branch1][C][=Branch2][Ring2][O][=C][Branch2][Ring2][=Branch1][C][=C][Ring1][=Branch1][O][C@][Branch1][Branch1][C][C][Ring1][=Branch1][Branch1][C][C][C][C][C][C@H1][Branch1][C][C][C][C][C][C@H1][Branch1][C][C][C][C][C][C][Branch1][C][C][C][C][O][C][=Branch1][C][=O][C][C]"}, {"from": "gpt", "value": "The molecule is the acetate ester of a fat-soluble vitamin with potent antioxidant properties.  Considered essential for the stabilization of biological membranes (especially those with high amounts of polyunsaturated fatty acid), vitamin E is a generic name for a group of compounds known as tocopherols and tocotrienols (tocols).  This agent is a potent peroxyl radical scavenger and inhibits noncompetitively cyclooxygenase activity in many tissues, resulting in a decrease in prostaglandin production.  Vitamin E also inhibits angiogenesis and tumor dormancy through suppressing vascular endothelial growth factor (VEGF) gene transcription. (NCI04)"}]