Thirteen alkaloids have been isolated from the aerial parts of Boronia bowmanii (Rutaceae). These were identified on the basis of spectroscopic analysis as 1-acetoxymethyl-2,3-dimethyl-4-quinolinone, 1-acetoxymethyl-2-methyl-4-quinolinone, 2,3-dimethyl-4-quinolinone, 1-acetoxymethyl-2-nonyl-4-quinolinone [4], 1-methyl-2-nonyl-4-quinolinone, 2-nonyl-4-quinolinone, 1-hydroxy-9-acridanone, 1,8-dihydroxy-9-acridanone, 1,8-dihydroxy-3-methoxy-9-acridanone [10], preskimmianine, dictamnine, evolittine and gamma-fagarine. Alkaloids 4 and 10 are novel.