Wahbi, A. M. published the artcileSpectrophotometric analysis of binary mixtures of antazoline and naphazoline, Product Details of C17H20ClN3, the publication is Journal of Pharmaceutical Sciences (1978), 67(1), 140-1, database is CAplus and MEDLINE.
Simultaneous spectrophotometric determination of antazoline-HCl (I) [2508-72-7] and naphazoline-HNO3 (II) [5144-52-5] in nasal drops involved dilution of 1 mL nasal drop solution to 50 mL with 0.1 N H2SO4, measuring the absorbancies at 281 and 295 nm, and applying the Glenn (1960), Cho (1970), and Pernarowski (1961) equations. Mean percentage recoveries for I were 99.5 (±1.05) and 99.7 (±1.24), resp., for 10 samples; for II they were 107.1 (±2.35) and 107.1 (±2.64), resp., for 10 samples. The relatively high percentage recoveries obtained for II were due to its low contribution to the absorption curve of the total mixture at the concentration used. Accuracy and precision for the determination of II was improved by applying the method of least squares.
Journal of Pharmaceutical Sciences 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 C8H7BO2S, Product Details of C17H20ClN3.
Referemce:
https://en.wikipedia.org/wiki/Imidazole,
Imidazole | C3H4N2 – PubChem