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Table 1 Phenolic composition of methanol (M), water (Dw) and ethyl acetate (Ea) extracts of A. bracteosa

From: Polarity based characterization of biologically active extracts of Ajuga bracteosa Wall. ex Benth. and RP-HPLC analysis

Classification of phenolic compounds Retention time Extracts (mg/g extract)
  Ea Dw M
Phenols Hydroquinone 10.07 Nd Nd Nd
Pyrocatechol 12.06 Nd 0.071 ± 0.003 Nd
Resorcinol 17.48 0.239 ± 0.01 0.196 ± 0.02 Nd
Cinnamic acid derivatives Caffeic acid 27.51 0.224 ± 0.03 0.128 ± 0.01 1.496 ± 0.2
Chlorogenic acid 25.80 2.032 ± 0.02 0.985 ± 0.04 3.295 ± 0.4
Ferulic acid 34.87 0.105 ± 0.02 Nd Nd
p-Coumaric acid 30.16 0.063 ± 0.002 0.024 ± 0.002 0.121 ± 0.02
Sinapic acid 50.05 Nd 1.059 ± 0.01 0.860 ± 0.04
Trans cinnamic acid 54.44 Nd 0.068 ± 0.004 Nd
Benzoic acid derivatives Gallic acid 15.24 3.495 ± 0.24 0.089 ± 0.005 1.654 ± 0.2
Salicylic acid 28.21 Nd Nd 0.124 ± 0.01
Vanillic acid 38.48 0.127 ± 0.02 0.054 ± 0.003 Nd
Flavonol flavonoid Kaempferol 73.06 0.103 ± 0.01 0.412 ± 0.04 0.411 ± 0.03
Quercetin 63.13 0.038 ± 0.015 0.065 ± 0.005 0.220 ± 0.02
flavonol glycoside Rutin 58.79 0.035 ± 0.003 0.076 ± 0.003 Nd
Flavan-3-ol flavonoid Catechin 23.61 0.162 ± 0.02 0.203 ± 0.02 Nd
Tannin Ellagic acid 67.35 Nd Nd Nd
Miscellaneous Coumarin 44.85 0.402 ± 0.03 0.427 ± 0.03 1.689 ± 0.2
  1. Nd Not detected