yellow to yellow-brown crystalline powder
The common presence of 4-quinolinecarboxaldehyde in honey from Galicia (northwest of Spain). As opposed to other quinoline carboxylic acid derivatives, the 4- quinolinecarboxaldehyde species has not been correlated with the anti-diabetic properties of honey; nevertheless, it appears to be active against intestinal bacteria.
4-Quinolinecarboxaldehyde was used in the synthesis of lepidylamines. It also shows antimicrobial activity toward human intestinal bacteria such as Clostridium perfringens.
[1] Tamara Rodríguez-Cabo. “Time-of-flight accurate mass spectrometry identification of quinoline alkaloids in honey.” Analytical and Bioanalytical Chemistry 407 20 (2015): 6159–6170.
