the inhibitory effects of 4 retinoids , namely , retinal ( ral ) , retinoic acid ( ra ) , retinyl acetate ( rac ) , and retinyl palmitate ( rp ) , and 3 carotenoid including beta-carotene ( bct ) , lycopene ( lcp ) , and crocetin ( cct ) on the growth and dna synthesis of rat c-6 glioma cells were studied .
C0007271
carotenoid
C0053396
beta-carotene