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Characterization of the variation in the imidazole alkaloid profile of Pilocarpus microphyllus in different seasons and parts of the plant by electrospray ionization mass spectrometry fingerprinting and identification of novel alkaloids by tandem mass spectrometry.
Abreu IN, Mazzafera P, Eberlin MN, Zullo MA, Sawaya AC. Abreu IN, et al. Rapid Commun Mass Spectrom. 2007;21(7):1205-13. doi: 10.1002/rcm.2942. Rapid Commun Mass Spectrom. 2007. PMID: 17330216