摘要
Four kinds of Carotenoid pigments were found in Rhodococcm rhodochrous RNMS1. Spectroscopic and chemical evidence showed two of them to be monocyclic carotenoids each containing a tertiary hydroxyl group at C1, and their structures were determined as 1', 2'-dihydro-β, ψ-caroten-rol and 1'-hydroxy-r, 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 C6 hydroxyl group of the glucose moiety. The fatty acids consisted of four saturated (C16:0-C19:0), four mono-unsaturated (CIS: 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.
摘要译文
在Rhodococcm rhodochrous RNMS1中发现了四种类胡萝卜素颜料。光谱和化学证据表明，它们中的两个是单环类胡萝卜素，各自在C 1处含有叔羟基，其结构确定为1'，2'-二氢-β，ψ-胡萝卜素-rol和1'-羟基-r ，2'-二氢-β，ψ-胡萝卜素-4-1。另外两个是新颖的类胡萝卜素衍生物，一个是后者类胡萝卜素的单糖苷，另一个是该类胡萝卜素糖苷的其他单酯，它们在葡萄糖部分的C 6羟基处被九种主要脂肪酸酯化。脂肪酸由四种饱和（C16：0-C19：0），四个单不饱和（CIS：1-C21：l）和一个支链（10-甲基C19：0）酸组成，包括奇数那些。确定结构为1'-[（β-D-吡喃葡萄糖基）氧基] -1'，2'-二氢-β，ψ-胡萝卜素-4-一个和1'-[（6-O-酰基-β -D-吡喃吡喃糖基氧基] -1'，2'-二氢-β，ψ-胡萝卜素-4-4。
Shinichi TAKAICHI[1];Jun-ichi ISHIDSU[1];Toshinori SEKI[1];Shigeo FUKADA[2]. Carotenoid Pigments from Rhodococcm rhodochrom RNMS1: Two Monocyclic Carotenoids, a Carotenoid Monoglycoside and Carotenoid Glycoside Monoesters[J]. Agricultural and Biological Chemistry, 1990,54(8): 1931-1937