4-[2-[4-[1-(2-Ethoxyethyl)-1H-benzimidazol-2-yl]-1-piperidinyl]ethyl]-α,α-dimethylbenzeneacetic acid (ACI); 2-[-4-(2-[4-[1-(2-Ethoxyethyl)-1H-benzimidazol-2-yl]-1-piperidinyl]ethyl)phenyl]-2-methylpropanoic acid; Bilastine,2-(4-(2-(4-(1-(2-ethoxyethyl)-1H-benzo[d]imidazol-2-yl)piperidin-1-yl)ethyl)phenyl)acetic acid-d6,"Labeled Bilastine, intended for use as an internal standard for the quantification of Bilastine by GC- or LC-mass spectrometry.",Bilastine Stable Isotopes