WARNING: This product is for research use only, not for human or veterinary use.

MedKoo CAT#: 407212

CAS#: 1206123-37-6 (free base)

Description: Etrasimod, also known as APD334, is a potent, centrally available, functional antagonists of the S1P1 receptor for use as next generation therapeutics for treating multiple sclerosis (MS) and other autoimmune diseases. APD334 has a favorable PK/PD profile, producing robust lymphocyte lowering at relatively low plasma concentrations in several preclinical species. APD334 was efficacious in a mouse experimental autoimmune encephalomyelitis (EAE) model of MS and a rat collagen induced arthritis (CIA) model and was found to have appreciable central exposure.

Chemical Structure

CAS# 1206123-37-6 (free base)

Theoretical Analysis

MedKoo Cat#: 407212
Name: Etrasimod
CAS#: 1206123-37-6 (free base)
Chemical Formula: C26H26F3NO3
Exact Mass: 457.18648
Molecular Weight: 457.49321
Elemental Analysis: C, 68.26; H, 5.73; F, 12.46; N, 3.06; O, 10.49

Price and Availability

Size Price Availability Quantity
5.0mg USD 280.0 2 weeks
10.0mg USD 480.0 2 weeks
25.0mg USD 960.0 2 weeks
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Related CAS #: 1206123-37-6 (free base)   1206123-97-8 (arginine)    

Synonym: APD334; APD-334; APD 334; Etrasimod.

IUPAC/Chemical Name: (R)-2-(7-((4-cyclopentyl-3-(trifluoromethyl)benzyl)oxy)-1,2,3,4-tetrahydrocyclopenta[b]indol-3-yl)acetic acid


InChi Code: InChI=1S/C26H26F3NO3/c27-26(28,29)22-11-15(5-8-19(22)16-3-1-2-4-16)14-33-18-7-10-23-21(13-18)20-9-6-17(12-24(31)32)25(20)30-23/h5,7-8,10-11,13,16-17,30H,1-4,6,9,12,14H2,(H,31,32)/t17-/m1/s1


Appearance: Solid powder

Purity: >98% (or refer to the Certificate of Analysis)

Shipping Condition: Shipped under ambient temperature as non-hazardous chemical. This product is stable enough for a few weeks during ordinary shipping and time spent in Customs.

Storage Condition: Dry, dark and at 0 - 4 C for short term (days to weeks) or -20 C for long term (months to years).

Solubility: Soluble in DMSO, not in water

Shelf Life: >2 years if stored properly

Drug Formulation: This drug may be formulated in DMSO

Stock Solution Storage: 0 - 4 C for short term (days to weeks), or -20 C for long term (months).

HS Tariff Code: 2934.99.9001

Preparing Stock Solutions

The following data is based on the product molecular weight 457.49321 Batch specific molecular weights may vary from batch to batch due to the degree of hydration, which will affect the solvent volumes required to prepare stock solutions.

Recalculate based on batch purity %
Concentration / Solvent Volume / Mass 1 mg 5 mg 10 mg
1 mM 1.15 mL 5.76 mL 11.51 mL
5 mM 0.23 mL 1.15 mL 2.3 mL
10 mM 0.12 mL 0.58 mL 1.15 mL
50 mM 0.02 mL 0.12 mL 0.23 mL

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1: Buzard DJ, Kim SH, Lopez L, Kawasaki A, Zhu X, Moody J, Thoresen L, Calderon
I, Ullman B, Han S, Lehmann J, Gharbaoui T, Sengupta D, Calvano L, Montalban AG,
Ma YA, Sage C, Gao Y, Semple G, Edwards J, Barden J, Morgan M, Chen W, Usmani K,
Chen C, Sadeque A, Christopher RJ, Thatte J, Fu L, Solomon M, Mills D, Whelan K,
Al-Shamma H, Gatlin J, Le M, Gaidarov I, Anthony T, Unett DJ, Blackburn A, Rueter
J, Stirn S, Behan DP, Jones RM. Discovery of APD334: Design of a Clinical Stage
Functional Antagonist of the Sphingosine-1-phosphate-1 Receptor. ACS Med Chem
Lett. 2014 Nov 4;5(12):1313-7. doi: 10.1021/ml500389m. eCollection 2014 Dec 11.
PubMed PMID: 25516790; PubMed Central PMCID: PMC4265817.