The present invention provides a production interrnediateof an atropisomer of a pyrrole derivative having excellentmineralocorticoid receptor antagonistic activity, a methodfor producing the same, and a crystal thereof. A method forproducing an atropisomer of a pyrrole derivative including astep of resolving a compound represented by the followinggeneral formula (I) [wherein R1 represents a methyl group ora trifluoromethyl group, R2 represents a hydrogen atom or aC1-C3 alkoxy group, and n represents an integer selected from1 to 3] into its atropisomers, characterized by using anoptically active amine having a cinchonine skeletal formula,and a crystal of(S) -1- (2-hydroxyethyl) -4-methyl-N- [4- (methylsulfonyl)pheny1] -5- [2- (trifluoromethyl) phenyl] -1H-pyrrole-3-carboxamide.(See Formula I)
