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Table 4 HPLC-PDA polyphenolic quantification of the tested M. buxifolia leaves and stem extracts (μg/mg)

From: Metabolic fingerprinting, antioxidant characterization, and enzyme-inhibitory response of Monotheca buxifolia (Falc.) A. DC. extracts

Polyphenoilic compounds Leaves Stem
Methanol Chloroform Methanol Chloroform
Gallic acid nd Nd nd BLQ
Catechin 4.29 ± 0.52 Nd 7.75 ± 0.84 3.95 ± 0.86
Vanillic acid nd BLQ nd nd
Epicatechin 0.59 ± 0.05 0.89 ± 0.08 1.29 ± 0.95 0.82 ± 0.08
3-OH benzoic acid nd Nd nd 0.79 ± 0.09
Rutin 0.74 ± 0.08 13.7 ± 1.54 0.45 ± 0.04 nd
Naringin 0.27 ± 0.03 Nd nd nd
  1. Values are means SD of three measurements; BLD: below limit of detection < 0.1 μg/mL; BLQ: below limit of quantification < 0.2 μg/mL; nd: not detected
  2. Chlorogenic acid, p-OH benzoic acid, Syringic acid, 3-OH-4-MeO benzaldehyde, p-coumaric acid, Sinapinic acid, t-ferullic acid, 2.3-diMeO benzoic acid, Benzoic acid, o-coumaric acid, Quercetin, Harpagoside, t-cinnamic acid, Naringenin, and Carvacrol were not detected in any of the tested extracts