several retinoids ( tretinoin , retinol , retinal , retinyl acetate , etretinate and ro 10-1670 ) were tested in vitro for their ability to inhibit the generation of the leukocyte chemotactic factor leukotriene b4 ( ltb4 ) from calcium ionophore-stimulated rat pmn in vitro .
C0035339
retinoids
C0040845
tretinoin