Structure confirmation and enantiomeric composition of a phenyltetrahydroquinolinedione derivative with TRPA1-antagonistic activity

Relevance. Chemical structure data on a new active pharmaceutical ingredient (API) is mandatory information submitted during registration of the original medicinal product. Spectral properties study makes it possible to confirm the structure of the new compound, and it is also the basis for the further development of the API quality control methods. Some organic compounds can exist in the form of several stereoisomers, which may either not differ in therapeutic effect or be responsible for various biological effects, including toxic ones. Therefore, it is extremely important at the early stages of drug development to establish the enantiomeric composition of a potential API for its further quality control. The aim of this study was to confirm the structure and determination of the enantiomeric composition of a potential API - the phenyltetrahydroquinolinedione derivative with TRPAl-antagonistic activity. Material and methods. 1H NMR, 13C NMR, IR, UV methods were used to confirm the structure of the API; the enantiomeric composition was determined on a liquid chromatograph with a chiral column. Results and conclusions. The studied compound structure was confirmed, IR and UV spectrophotometry methods can be used in quality control of the API in attribute "Identification", the API test sample is a mixture of four stereoisomers in equal proportions.