YZ-202 is the free acid form of orbofiban. As a class II GPIIb/IIIa antagonist, YZ-202 has comparable efficacy to class I antagonists (such as XV459 and DMP802) in inhibiting platelet aggregation, but shows lower potential in altering TF-mediated clot formation strength. This suggests that despite similar anti-aggregation efficacy, YZ-202 may exhibit different effects on platelet-fibrin clot contraction.