The present invention relates to the adduct (2E)-but-2-enedioic acid-3-(2-{[4-(trifluoromethoxy)phenyl]amino}-1-[(1R,5R)-3,3,5-trimethylcyclohexyl]-1H-benzimidazol-yl)propanoic acid (1:4), methods for preparing this adduct, pharmaceutical compositions comprising this adduct and also the use of this adduct for preparing a medicament for the treatment of a disease.