two major carotenoids of the stick insect were reinvestigated and shown to be beta , beta-caroten-2-ol and beta , beta-carotene-2,2'-diol and not isocryptoxanthin ( beta , beta-carotin-4-ol ) and isozeaxaanthin ( beta , beta-carotene-4,4'-diol ) .
C0007271
carotenoids
C0053396
beta-carotene