Chemical profile of the polar extract of Paepalanthus microphyllus (Guill.) Kunth (Eriocaulaceae)

Abstract

From the ethanolic extract of the capitulae of Paepalanthus microphyllus, one caffeic acid derivative (1) was isolated. The structure of the compound was characterized by spectroscopic methods, mainly 1D and 2D NMR experiments, as well as ESMS spectrometry. In addition, three flavonoids of taxonomic relevance were isolated and identified by comparison to literature data.

Characterization of Flavonoids and Naphthopyranones in Methanol Extracts of Paepalanthus chiquitensis Herzog by HPLC-ESI-IT-MSn and Their Mutagenic Activity

“…These compounds were identified by comparing the peaks of their UV spectra with those of the available references in the literature. The naphthopyranones have characteristic bands at 270–273 and 280–284 nm [ 10 , 11 , 13 , 22 , 23 ].…”

“…The methanol extracts of capitulae and scapes of P. chiquitensis were processed as reported in Santos et al . [ 13 ]. The crude extract (1 g) was dissolved in methanol (10 mL) and the mixture was centrifuged for 5 min at 3,200 rpm.…”

“…Flavonoids have frequently been used in chemotaxonomy, because they are widespread, their patterns tend to be specific, they are relatively stable and their biosynthesis/accumulation is largely independent of environmental influence [ 9 ]. In our laboratories, glycosylated acyl flavonoids and quercetin derivatives with one sugar unit have been isolated from Paepalanthus genus [ 2 , 10 , 11 , 12 , 13 ].…”

The isolation, structural characterization, and anticancer activity from the aerial parts of Cymbopogon flexuosus

“…Therefore, The SA3 is an ester of glycerol with two caffeic acid units. Based on the comparison of the data with the literature values (Santos et al, ), compound SA3 was concluded to be 1,3‐O‐di‐E‐caffeoylglycerol (Figure a). Caffeic acid and other hydroxycinnamic derivatives play an important role in protecting plants against herbivores and pathogens (Bazzalo, Heber, Martinez, Delpero, & Caso, ).…”

Review on Compounds Isolated from Eriocaulaceae Family and Evaluation of Biological Activities by Machine Learning

“…Three flavonoids, 3′,4′,5,6,7,8-hexahydroxyflavone ( 48 ), 3′,4′,5,6,7-pentahydroxyflavone ( 56 ), and 3′,4′,5,6-tetrahydroxy-7- O -β-D-glucopyranosilflavone ( 57 ), were obtained from ethanolic extract of Paepalanthus microphyllus capitula [ 46 ]. According to Dokkedal et al (2008) in their review on Paepalanthus chemistry, compound 56 was also isolated in Paepalanthus robustus , P. planifolius , and P. flavescens and 57 was also found in P. planifolius and P. flavescens [ 22 ].…”