The Scientific World Journal / 2014 / Article / Tab 1

Research Article

Flavonoids in Juglans regia L. Leaves and Evaluation of In Vitro Antioxidant Activity via Intracellular and Chemical Methods

Table 1

The retention time, fragment ions, tentative identification, and quantification results of flavonoids and phenolic acids in Juglans regia L. Leaves.

Peak (min) M–H
   CompoundContent
(μg/g)e
Reference

18.7353191, 179, 1355-O-Caffeoylquinic acid (neochlorogenic acid) Std.
29.0289202.2, 123.0Epicatechina Std.
39.5337191, 163, 118.93-p-Coumaroylquinic acid Ref. [10, 11]
411.1507327.3Syringetin-O-hexosidea Ref. [12]
511.2339158.6Unknowna
612.0479316Myricetin-3-O-glucosidea Ref. [12, 13]
713.1449316Myricetin-3-O-pentosidea Ref. [13, 14]
813.2177131.3, 115.2, 92.3Esculetina Ref. [15, 16]
913.3435285, 150.8Taxifolin-pentosidea Ref. [17, 18]
1013.5477300.9, 150.8Quercetin-3-O-glucuronidea Std.
1113.8463300.0, 270.8Quercetin-3-O-galactoside (hyperoside) Std.
1214.3433300, 270.9Quercetin-3-O-pentoside derivative Ref. [1, 5, 11]
1314.7433299.7, 271.1Quercetin-3-O-xyloside Ref. [1, 11, 19, 20]
1414.9433301.0, 299.9, 270.8Quercetin-3-O-arabinoside Std.
1515.3447300.1, 284.2, 254.9Quercetin-3-O-rhamnoside (huercitrin) Std.
1616.2417285.0, 254.7, 226.9Kaempferol-O-pentosidea Ref. [21, 22]
1716.8417284.7, 254.7Kaempferol-O-pentoside derivative Ref. [11, 21, 22]
1817.4431285.2Kaempferol-O-rhamnosidea Ref. [23, 24]

Compounds identified for the first time in J. regia leaves; expressed in equivalents of 5-O-caffeoylquinic acid; expressed in equivalents of quercetin-3-O-rhamnoside; expressed in equivalents of quercetin-3-O-arabinoside; mean ± RSD; Ref.: literature where the compound has been characterized by MS analysis; Std.: standard.