The p-dialkylaminostyrylquinolinium salts were deep purple or green crystalline solids which formed purple solutions in water, while the other salts ranged from yellow to red in color and formed yellow or orange solutions. The solubilities in hot water were of the order of 0.01- ...
![2-[(E)-2-(3,4-diethoxyphenyl)ethenyl]-1-methyl-2H-quinoline Structure](https://image.chemsrc.com/caspic/459/7469-64-9.png)