1973 年 93 巻 4 号 p. 535-538
The reaction of typical compounds related to drugs of alkylbenzene having an amino group on side-chain with Marquis reagent was investigated to clarify the mechanism of the coloration. Considering the results obtained by using spectroscopic methods and from elementary analysis, the coloration may be ascribed to the formation of condensation products of the amines with formaldehyde.