Synonyms: a-Carotene, all-trans- (8CI);(all-E)-1,3,3-Trimethyl-2-[3,7,12,16-tetramethyl-18-(2,6,6-trimethyl-2-cyclohexen-1-yl)-1,3,5,7,9,11,13,15,17-octadecanonaenyl]cyclohexene;Cyclohexene,1,3,3-trimethyl-2-[3,7,12,16-tetramethyl-18-(2,6,6-trimethyl-2-cyclohexen-1-yl)-1,3,5,7,9,11,13,15,17-octadecanonaenyl]-,(all-E)-; Hi-Alpha; all-trans-a-Carotene; a-Carotene