in the present study , three retinoids ( ro 15-1570 , arotinoid ethylsulfone , 6 mg/kg ; retinoic acid , 100 mg/kg and etretinate , 50 mg/kg ) were administered orally to rats for 1 and 2 weeks , respectively , to six male and six female rats/group .
C0035339
retinoids
C0040845
retinoic acid