the effects of three retinoids : all-trans-retinoic acid ( ra ) , 13-cis-retinoic acid ( 13-cis-ra ) , and n- ( 4-hydroxyphenyl ) retinamide ( 4-hpr ) on murine splenic lymphocyte proliferative responses to mitogens were evaluated .
C0035339
retinoids
C0040845
all-trans-retinoic acid