L 888607 Racemate is a selective antagonist of prostaglandin D2 receptor subtype 1 (DP1) (Kis: 132 nM and 17 nM for DP1 and thromboxane A2 receptor (TP), respectively).
Ici D1542 is a drug that exhibits both potent, selective TXS inhibition and TXA2 receptor antagonism. Ici D1542 is an effective thromboxane A2 synthase inhibitor and receptor antagonist in vitro.