Etrasimod arginine and its Impurities

Etrasimod, sold under the brand name Velsipity, is an oral medication used to treat adults with moderately to severely active ulcerative colitis (UC). It belongs to a class of drugs called sphingosine-1-phosphate (S1P) receptor modulators. Reference standards of Etrasimod Arginine API, and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below.