Vitamin A analogs Vitamin a acid: it mainly influences skeletal growth and metabolism of epithelial tissue.It has better effect on prevention and cure of canner The compound is a choice drug for treatment of acute promyelocytic leukemia(aPl) H3C CH CH CH3 OH CH.Vitamin A analogs • Vitamin A acid: it mainly influences skeletal growth and metabolism of epithelial tissue. It has better effect on prevention and cure of canner. • The compound is a choice drug for treatment of acute promyelocytic leukemia (APL). H3C CH3 CH3 O CH3 CH3 OH