In the course of isolating acronycine (1) from an alkaloid fraction of the bark of Acronychia baueri (Rutaceae), five alkaloids, 1,2,3-trimethoxy-10-methyl-acridone (9), 1,3,4-trimethoxy-10-methyl-acridone (10), des-N-methyl acronycine (14), normelicopine (5), and noracronycine (2), were isolated.