Ro 3-1314 is an inhibitor of both COX and lipoxygenase. Ro 3-1314 inhibits ram seminal vesicle COX with a Ki of 0.6 µM. It is a more effective inhibitor of COX-1 than of 15-LO, inhibiting 95% and 68%, respectively, of these enzymatic activities when used at a concentration of 48 µM.