Neo-P-carotene

Figure 6-17 Absorption Spectra of the Three Stereoisomers of Beta Carotene. B - neo-p-carotene U = neo-p-carotene-U T = all-trans-p-carotene. a, b, c, and d indicate the location of the mercury arc lines 334.1, 404.7, 435.8 and 491.6 nm, respectively. Source From F. Stitt et al Spectrophotometric Determination of Beta Carotene Stereoisomers in Alfalfa, J. Assoc. Off. Agric. Chem. Vol. 34, pp. 460-471, 1951.

Physiological forms of vitamin A include retinol (vitamin Ai) and its esters, 3-dehydroretinol (vitamin A2) and its esters, retinal (retinene, vitamin A aldehyde), 3-dehydroretinal (retine-2), retinoic acid, neovitamin A, and neo-p-vitamin Aj. Active analogs and related compounds known as vitamin A are a-, P-, and 7-carotene, neo-p-carotene B, cryptoxanthine, myxoxanthine, torular-hodin, aphanicin, and echinenone. Kitol, xanthophyll, and others are inactive analogs and related compounds of vitamin A. Vitamin A supports the formation of the cells of the skin and is essential for vision. It is involved in the viabihty of the reproductive system by acting as a hormone and... 

---