New C37 Skeletal Carotenoid from the Clam, Paphia amabillis
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- 作者：Takashi Maoka ; Naoshige Akimoto ; Mi-Jin Yim ; Masashi Hosokawa ; Kazuo Miyashita
- 刊名：Journal of Agricultural and Food Chemistry
- 出版年：2008
- 出版时间：December 24, 2008
- 年：2008
- 卷：56
- 期：24
- 页码：12069-12072
- 全文大小：156K
- 年卷期：v.56,no.24(December 24, 2008)
- ISSN：1520-5118
文摘
Carotenoids in the muscle of Paphia amabillis (Veneridae) were investigated. Amarouciaxanthin 3-ester (1a) was found to be a major carotenoid along with amarouciaxanthin A (1b), fucoxanthinol 3-ester (2), peridininol 3′-ester (3), and a new C37 skeletal carotenoid, named hydratopyrrhoxanthinol 3′-ester. This structure was determined to be 3′-acyloxy-3,5,6-trihydroxy-7′,8′-didehydro-5,6-dihydro-12′,13′,20′-trinor-β,β-caroten-19,11-olide (4) by UV−vis, NMR, and FAB-MS spectral data. The absolute configuration of 4 was postulated to be (3S,5R,6R,3′R) on the bases of CD and ROESY data. The fatty acids esterified with hydratopyrrhoxanthinol were assigned as C22:6, C20:1, C20:4, C20:5, C18:0, C18:1, C17:0, C16:0, C16:1, and C14:0 on the basis of FAB-MS data.