Carotenoid Pigments from Rhodococcus rhodochrous RNMS1 : Two Monocyclic Carotenoids, a Carotenoid Monoglycoside and Carotenoid Glycoside Monoesters(Organic Chemistry)

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Four kinds of carotenoid pigments were found in Rhodococcus rhodochrous RNMS1. Spectroscopic and chemical evidence showed two of them to be monocyclic carotenoids each containing a tertiary hydroxyl group at C_1, and their structures were determined as 1',2'-dihydro-β,ψ-caroten-1'-ol and 1-hydroxy-1',2'-dihydro-β,ψ-caroten-4-one. The other two were novel carotenoid derivatives, one being a monoglycoside of the latter carotenoid and the other monoesters of this carotenoid glycoside, which were esterified with nine major fatty acids at the C_6 hydroxyl group of the glucose moiety. The fatty acids consisted of four saturated (C16:0-C19:0), four mono-unsaturated (C18: 1-C21:l) and one branched-chain (10-methyl C19:0) acid, including the odd-numbered ones. The structures were determined to be 1'-[(β-D-glucopyranosyl)oxy]-1',2'-dihydro-β,ψ-caroten-4-one and 1'-[(6-O-acyl-β-D-glucopyranosyl)oxy]-1',2'-dihydro-β,ψ-caroten-4-one.
社団法人日本農芸化学会の論文
1990-08-23