Sanghavi, N. M. published the artcileColorimetric determination of insoluble phosphomolybdic acid complexes of antihistamines, Safety of N-Benzyl-N-((4,5-dihydro-1H-imidazol-2-yl)methyl)aniline hydrochloride, the publication is Indian Drugs (1980), 18(1), 25-8, database is CAplus.
Antihistamines viz. antazoeine-HCl [2508-72-7], dimenhydrinate [523-87-5], cyclizine-HCl [303-25-3], chlorcyclizine-HCl [14362-31-3] and diphenhydramine-HCl [147-24-0] are precipitated with phosphomolybdic acid; hydrazine hydrate quant. reduces the insoluble complexes to molybdenum blue which is measured colorimetrically. A linear relationship exists between the absorbance of the reaction product and the concentration of the drug present. Recovery from spiked tablet samples is 99.0-100.3%.
Indian Drugs published new progress about 2508-72-7. 2508-72-7 belongs to imidazoles-derivatives, auxiliary class Inhibitor,Immunology/Inflammation,Histamine Receptor, name is N-Benzyl-N-((4,5-dihydro-1H-imidazol-2-yl)methyl)aniline hydrochloride, and the molecular formula is C17H20ClN3, Safety of N-Benzyl-N-((4,5-dihydro-1H-imidazol-2-yl)methyl)aniline hydrochloride.
Referemce:
https://en.wikipedia.org/wiki/Imidazole,
Imidazole | C3H4N2 – PubChem