da Silva Mathias M, Rodrigues de Oliveira R. Differentiation of the phenolic chemical profiles of Cecropia pachystachya and Cecropia hololeuca.
Phytochem Anal 2019;
30:73-82. [PMID:
30144200 DOI:
10.1002/pca.2791]
[Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2017] [Revised: 06/12/2018] [Accepted: 07/07/2018] [Indexed: 06/08/2023]
Abstract
INTRODUCTION
Cecropia pachystachya and C. hololeuca are common species in Brazil, popularly used to treat respiratory diseases. Phytochemical studies indicate that their leaves are rich in phenolic compounds, mainly C-glycosilated flavonoids. Orientin and isoorientin are reported in both species, while vitexina and isovitexina were reported in C. pachystachya. In addition, both are rich in chlorogenic acid and have some procyanidins. In some cases, syrups and teas are prepared from leaf blends from different species, which may affect the efficacy and safety of this natural medication. This problem motivated the investigation of the chemical profile of leaves of these species.
OBJECTIVE
The phenolic chemical profiles from C. pachystachya and C. hololeuca methanolic extracts were analysed by ultra-high performance liquid chromatography coupled with a diode array detector and mass spectrometry (UPLC-DAD-MS), to investigate possible differences in their metabolite production.
MATERIAL AND METHODS
The methanolic extracts of both species were analysed by UPLC-DAD-MS using a C-18 reverse phase column, DAD at 190-400 nm and electrospray ionisation quadruple time-of-flight (ESI-Q-TOF) mass spectrometer. The separation methodology was validated and most of the flavones present in the extracts were quantified.
RESULTS
Thirty-seven compounds were tentatively identified, including flavonoids, phenolic acids, flavan-3-ols, condensed tannins (procyanidins) and iridoids, through UV analysis and tandem mass spectrometry (MS/MS) spectra obtained in the negative mode. Chlorogenic acid, orientin and isoorientin were observed as the major constituents in both extracts.
CONCLUSIONS
Cecropia pachystachya presented a more diverse chemical profile than C. hololeuca. The methodology developed herein could be an important tool to analyse commercial Cecropia (embaúba) products.
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