retinoids , such as retinal , retinol , retinoic acid and retinol acetate , and flavonoids , such as quercetin , rutin , morin and sciadopitysin , inhibit ca2+-dependent pla2 activity of human synovial fluid ( hsf ) in vitro in a dose-dependent fashion ;
C0035339
retinoids
C0040845
retinoic acid