Marin SFJ, Torres AOL, Santafe PGG, Saez VAA, Guzman TCA

Language: Spanish
References: 30
Page: 1-12
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ABSTRACT

Introduction: The species Esenbeckia litoralis Donn. Sm. (Rutaceae), also known as loro or loro grande, has been used in traditional medicine to treat snakebites, sore throats and lesions caused by insect bites. The compounds contained in the plant, among them lignans, terpenes, alkaloids, coumarins and polyphenols, are responsible for such a broad variety of activities, granting it great pharmacological potential.
Objective: Conduct a phytochemical study and evaluation of the antioxidant activity of the species E. litoralis.
Methods: Plant extracts from leaves, stem and wood were obtained using 96% ethanol, and then fractioned with chromatographic techniques such as thin-layer chromatography (TLC), column chromatography (CC) and preparative thin-layer chromatography (PTLC). The compounds were identified by spectroscopic data analysis using instrumental techniques such as infrared (IR) spectroscopy, proton and Carbon-13 nuclear magnetic resonance (NMR-1H and 13C), mass spectrometry (MS) and X-ray diffraction (XRD). Antioxidant activity was evaluated with the methods ABTSo+ radical cation, DPPHo free radical and ferric reducing ability power (FRAP).
Results: Five compounds were isolated from the species: four alkaloids and one flavonoid. Ethyl acetate extracts from leaves and stem displayed significant activity against ABTSo+ radicals, with a CI50 of 5.65 and 7.65 μg/ml, respectively.
Conclusions: Five compounds were isolated from the various extracts: 1-hydroxy-3- methoxy-N-methylacridone (1), maculosidin (2), maculin (3), dictamin (4) and gardenin B (5). The leaf and stem extract in ethyl acetate displayed significant antioxidant activity against the ABTS radical, with a CI50 of 5.65 and 7.65 mg/l, respectively.

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