[UV-spectrophotometry in drug control. 33. New drugs with benzene, pyridine, quinoline and phenanthrene chromophores in the molecule. 6. The effect of substitution and solvents]. / UV-Spektrofotometrie in der Arzneimittelkontrolle. 33. Mitteilung: Neuere Arzneistoffe mit Benzen-, Pyridin-, Chinolin- und Phenanthren-Chromophoren im Molekül. Teil 6: Einfluss der Substitution und der Lösungsmittel.

UV-spectra of 14 new substances with benzene, pyridine, quinoline and phenanthrene chromophores as well as influences of substitutes and solvents on shifts of the bands E, K, B and R are discussed.

[UV spectrophotometry in drug control. 37. New active substances containing benzene, pyridine and quinoline chromophores in the molecule. 8. Effect of substitution and solvent]. / UV Spektrophotometrie in der Arzneimittelkontrolle. 37. Mitteilung: Neuere Arzneistoffe mit Benzen-, Pyridin- und Chinolin-Chromophoren im Molekül Teil 8: Einfluss der Substitution und der Lösungsmittel.

The behaviour of 10 new substances with benzene, pyridine and chinoline chromophores was tested in the UV and visible spectral region. Influences of substituents and solvents on shifts of the bands E, K, B and R are discussed.

[UV spectrophotometry in drug control. 31. Spectrophotometric behavior of drugs with dibenzo-p-thiazine chromophores]. / UV-Spektrofotometrie in der Arzneimittelkontrolle. 31. Mitteilung: Spektrofotometrisches Verhalten von Arzneistoffen mit Dibenzo-p-thiazin-Chromophoren.

The results of a systematic examination of the spectra of 34 drugs with dibenzo-p-thiazine chromophores in the ultraviolet and visible range were evaluated. The substances under study were subdivided into 10 different types corresponding to a different substitution in position 3 and in one case in position 5 of the phenothiazine ring system. All of these types are characterized by the bands E, K and B which are--with only a few exceptions--separated by well developed absorption minima.