Date published: 2026-5-21

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2-[3-[(4-fluorophenyl)sulfonyl-methylamino]-1,2,3,4-tetrahydrocarbazol-9-yl]acetic acid) (CAS 627865-18-3)

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Alternate Names:
(+)-3-[[(4-fluorophenyl)sulfonyl]methylamino]-1,2,3,4-tetrahydro-9H-carbazole-9-acetic acid
CAS Number:
627865-18-3
Molecular Weight:
416.47
Molecular Formula:
C21H21FN2O4S
For Research Use Only. Not Intended for Diagnostic or Therapeutic Use.
* Refer to Certificate of Analysis for lot specific data.

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The biological effects of prostaglandin D2 are transduced by at least two 7-transmembrane G-protein coupled receptors, designated DP1 and CRTH2/DP2. BAY-u3405 (Ramatroban) is approved to be used as human medication for the treatment of allergic rhinitis that has recorded activity as an antagonist of both the TP and CRTH2/DP2 receptors (1,2). CAY10471 is an analog of BAY-u3405 which contains modifications that increase both its selectivity and potency for the human CRTH2/DP2 receptor (3). CAY10471 binds to the human CRTH2/DP2, DP1, and TP receptors with Ki values of 0.6, 1200, and >10,000 nM, respectively (3).


2-[3-[(4-fluorophenyl)sulfonyl-methylamino]-1,2,3,4-tetrahydrocarbazol-9-yl]acetic acid) (CAS 627865-18-3) References

  1. An orally bioavailable small molecule antagonist of CRTH2, ramatroban (BAY u3405), inhibits prostaglandin D2-induced eosinophil migration in vitro.  |  Sugimoto, H., et al. 2003. J Pharmacol Exp Ther. 305: 347-52. PMID: 12649388
  2. Minor structural modifications convert the dual TP/CRTH2 antagonist ramatroban into a highly selective and potent CRTH2 antagonist.  |  Ulven, T. and Kostenis, E. 2005. J Med Chem. 48: 897-900. PMID: 15715457
  3. BAY u3405, a potent and selective thromboxane A2 receptor antagonist on airway smooth muscle in vitro.  |  McKenniff, MG., et al. 1991. Br J Pharmacol. 104: 585-90. PMID: 1839139

Ordering Information

Product NameCatalog #UNITPriceQtyFAVORITES

2-[3-[(4-fluorophenyl)sulfonyl-methylamino]-1,2,3,4-tetrahydrocarbazol-9-yl]acetic acid), 1 mg

sc-221402
1 mg
$81.00

2-[3-[(4-fluorophenyl)sulfonyl-methylamino]-1,2,3,4-tetrahydrocarbazol-9-yl]acetic acid), 5 mg

sc-221402A
5 mg
$487.00