seven days after the oral administration of a standard dose ( 4.6 microci ) of 11,12- [ 3h2 ] retinyl acetate , during which period rats were fed the customary vitamin a-containing diet , bile was collected via bile duct cannulae for 1-4 hours , and then the livers and serum were extracted and analyzed .
C0073109
retinyl acetate
C0042839
vitamin a