Two new carbazole alkaloids, isomahanine and murrayanol, have been isolated from the fruits of Murraya koenigii (Rutaceae) along with the five previously reported carbazole alkaloids, mahanimbine, murrayazolidine, girinimbine, koenimbine and mahanine. The structures of isomahanine and murrayanol were confirmed by the formation of 9-methoxymahanimbicine on their methylation and cyclisation, respectively. X-Ray analysis was carried out on murrayazolidine. © 1992.