Photocatalytic degradation of waste pharmaceutics, with solar radiation, is described here
as a feasible method to purify pre-contaminated soils. Phenazopyridine has been used as a …

HPLC method was developed for the selective determination of phenazopyridine
hydrochloride (PAP) in the presence of its computationally selected metabolite. Density …

A new method is proposed for the synthesis of pyrido [3, 4-c] cinnolines and pyrido [3, 2-c]
cinnolines. Pyridine-3-diazonium tetrafluoroborates, containing donor methoxy groups in …

During the process development of phenazopyridine HCl bulk drug, a potential impurity was
detected in the routine impurity profiles by HPLC. Using MS–MS and multidimensional NMR …

The problem of photostability of drugs has received relatively little attention in the
pharmaceutical industry. Furthermore, until a decade ago, the degradation studies carried …

Pyrido [3, 4-c] pyridazines are nitrogen-containing scaffolds that have been described as
being promising in medicinal chemistry, but they are rather rare chemicals. In this review …

The article handles two related subjects. First, it's the study of forced-acid/heat degradation
of phenazopyridine HCl (PAP). The reaction pathway was evidenced with different criteria. A …

Циклическая система пиридо [3, 4-c] циннолина и его производных является
фактически неизученной. В результате поиска по базам данных Reaxys и SciFinder …

Циклическая система пиридо [3, 4-c] циннолинов и пиридо [3, 2-c] циннолинов, а также
их производных является фактически неизученной. В результате поиска по базам …