Ro 20-0657 000 is a metabolite of Trimethoprim, an inhibitor of dihydrofolate reductase and an antibacterial agent used in human and veterinary medicine.
Ro-24-0238 is an antagonist of platelet-activating factor and inhibitor of thromboxane synthesis. Ro-24-0238 used for lessening the inflammation and damage resulting from a local release of PAF.