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1. Calcium oxalate crystals and methyl salicylate as toxic principles of the fresh leaves from Palicourea longiflora, an endemic species in the Amazonas state.

Author

Coelho EG, Amaral AC, Ferreira JL, dos Santos AG, Pinheiro ML, and Silva JR

Subjects
Animals, Brazil, Calcium Oxalate chemistry, Crystallization, Gas Chromatography-Mass Spectrometry, Humans, Irritants chemistry, Plant Extracts chemistry, Plant Extracts toxicity, Plant Leaves chemistry, Rats, Rubiaceae chemistry, Salicylates chemistry, Calcium Oxalate toxicity, Irritants toxicity, Rubiaceae toxicity, Salicylates toxicity
Abstract

The species of the genus Palicourea (Rubiaceae family) is well-known for its toxicity towards animals, particularly livestock. This work reports the occurrence of skin irritation during the manipulation of Palicourea longiflora, considering the prevalence of the monofluoracetic acid (MFAA) and another toxic compound: methyl salicylate. The MFAA was identified by 19F-NMR and methyl salicylate by gas chromatography linked to mass spectrometry (GC/MS) analysis. Additionally, an anatomical study of leaves had been used to explain the mechanism of penetration of the toxic principles.

Published
2007
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