(CAS NO.: ), with other name of 1-((p-(2-(3-Ethyl-4-methyl-2-oxo-3-pyrroline-1-carboxamido)ethyl)phenyl)sulfonyl)-3-(trans-4-methylcyclohexyl)urea, could be produced through many synthetic methods.

Following is one of the synthesis routes: could be condensed (I) with 2-phenylethyl isocyanate (II) at 150 C to produce 3-ethyl-4-methyl-2-oxo-N-(2-phenylethyl)-3-pyrrolin-1-carboxamide (III), which is sulfonated with chlorosulfonic acid at 40 C to yield the corresponding benzenesulfonyl chloride (IV). The reaction of (IV) with concentrated NH₄OH affords the sulfonamide (V), which is finally condensed with 4-methylcyclohexyl isocyanate (VI) in acetone.