Phytochemical Investigation of the Constituents Derived from the Australian Plant Macropidia fuliginosa.

A phytochemical study of the flowers and bulbs derived from the Australian plant Macropidia fuliginosa, involving hyphenated spectroscopic methodologies (HPLC-NMR and HPLC-MS), together with conventional isolation strategies, resulted in the identification of 16 constituents (1, 2, 4-17) representative of six different structural classes. Six new compounds (12-17) were identified from the bulbs of the plant. The isolated compounds were assessed for antimicrobial activity, and compound 8 was found to be more potent against P. aeruginosa than ampicillin.