| 摘要 |
PURPOSE:To provide an antioxidant highly effective to fatty oils, also persistent in its effect, of high safety, useful for foods, drugs, cosmetics, etc. consisting mainly of naturally-occurring vegetables, comprising proanthocyanidin as chief component. CONSTITUTION:The objective antioxidant comprising as chief component, proanthocyanidin [pref. di-decamer from, as structural unit, flavan-3-ol or flavan- 3,4-dial of formula I (R1 is H or OH; R2-R4 are each H, OH or methoxyl; R5 is H, galoyl or glicopyranocyl), e.g., dimer procyanidin B-2].
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