S-5751

S-5751 is an antagonist of the prostaglandin D2 (PGD2) receptor DP1 (Ki = 1.6 nM) that shows at least 20-fold selectivity over receptors for thromboxane and prostacyclin, as well as the PGE2 receptor EP2. Orally administered S-5751 blocks PGD2-induced plasma exudation in the conjunctiva (ED50 = 0.099 mg/kg) and suppresses antigen-induced allergic responses in guinea pigs. S-5751 has been used to distinguish signaling of PGD2 through its two receptors, DP1 and DP2 (also known as CRTH2).Formal Name: (5Z)-7-[(1R,2R,3S,5S)-2-[[(5-hydroxybenzo[b]thien-3-yl)carbonyl]amino]-6,6-dimethylbicyclo[3.1.1]hept-3-yl]-5-heptenoic acid. CAS Number: 209268-36-0. Molecular Formula: C25H31NO4S. Formula Weight: 441.6. Purity: >95%. Formulation: (Request formulation change), A crystalline solid. Solubility: DMSO: 36 mg/ml. lambdamax: 221, 269, 317 nm. SMILES: OC(CCC/C=C\C[C@H]1C[C@@H]2C(C)(C)[C@@H](C2)[C@@H]1NC(C3=CSC4=C3C=C(O)C=C4)=O)=O. InChi Code: InChI=1S/C25H31NO4S/c1-25(2)16-11-15(7-5-3-4-6-8-22(28)29)23(20(25)12-16)26-24(30)19-14-31-21-10-9-17(27)13-18(19)21/h3,5,9-10,13-16,20,23,27H,4,6-8,11-12H2,1-2H3,(H,26,30)(H,28,29)/b5-3-/t15-,16-,20-,23+/m0/s1. InChi Key: ZXBHFWFKSIYJEK-MFJOXFORSA-N.