title: Identification of 5,8-oxyretinoic acid isolated from small intestine of vitamin A-deficient rats dosed with retinoic acid.
abstract: A retinoid was isolated by a multistep procedure from the small intestines of vitamin A-deficient rats given a single dose of retinoic acid. The compound, designated 8II, was pure, as demonstrated by four high-pressure liquid chromatographic procedures. It was positively identified as 5,8-oxyretinoic acid by ultraviolet spectrophotometry, mass spectrometry, and spectral and chromatographic comparison to known compounds. It is probable that 5,8-oxyretinoic acid was produced from 5,6-epoxyretinoic acid under the acidic conditions used in the isolation. It is highly probable, therefore, that the natural product is 5,6-epoxyretinoic acid.
mesh_terms: D000818:Animals; D002851:Chromatography, High Pressure Liquid; D007413:Intestinal Mucosa / Q000378:metabolism; D007421:Intestine, Small / Q000378:metabolism; D051381:Rats; D013056:Spectrophotometry, Ultraviolet; D014212:Tretinoin / Q000031:analogs & derivatives* / Q000302:isolation & purification / Q000378:metabolism*; D014801:Vitamin A / Q000031:analogs & derivatives*; D014802:Vitamin A Deficiency / Q000378:metabolism
chemical_list: C017597:5,8-oxyretinoic acid; D014801:Vitamin A; D014212:Tretinoin