Erythrina alkaloids: isolation and characterisation of alkaloids from seven erythrina species.

The alkaloids present in the seeds of seven ERYTHRINA species, E. FUSCA Lour, E. COSTARICENCIS M. Micheli, E. LEPTORHIZA A. DC., E. SPECIOSA Andrews, E. VARIEGATA L., E.MELANACANTHA Taubert ex Harms, and E. BERTEROANA Urban, have been screened by gas chromatography-mass spectrometry (GC/MS). The novel alkaloid erythrartine N-oxide has been isolated from E. BERTEROANA and characterized as an N-oxide of theknown alkaloid, erythrartine.