abstract |
Carotenoid compound of formula (2): ** Formula ** in which X is methyl or COOR in which R is independently selected from methyl, ethyl, methyl ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl and tert-butyl butyl; and n is selected from zero, 1, 2 and 3; and R2 is independently selected from octadecanoic acid, nonadecanoic acid, decanoic acid, undecanoic acid, dodecanoic acid, tridecanoic acid, tetradecanoic acid and pentadecanoic acid. |