Phenolic profile and antioxidant potential of wild watercress (Nasturtium officinale L.)

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Table 2 Identification of phenolic compounds in Watercress roots

Peak	Rt (min)	Identity	HPLC–DAD λ_max (nm)	References
1	1.6	Gallic acid	270	Santos et al. (2014)
2	3.4	Gallic acid derivative	269, 278	Santos et al. (2014)
3	5.2	Hydroxybenzoic acid derivative	279, 273	Santos et al. (2014)
4	7.0	Gallic acid derivative	271, 277	Santos et al. (2014)
5	10.3	p-Coumaric acid	309, 298	Santos et al. (2014)
6	11.6	p-Coumaric acid derivative	313	Santos et al. (2014)
7	12.4	Caftaric acid	328, 298	Aaby et al. (2007)
8	12.7	Sinapic acid	329, 304	Aaby et al. (2007)
9	10.3	Pro-anthocynidin trimer	309, 298sh	Aaby et al. (2007)
10	10.8	Caffeic acid hexoside	293, 283	Aaby et al. (2007)
11	11.4	Caffeic acid derivative	321, 296	Santos et al. (2014)
12	12.7	Sinapic acid glucoside	328	Aaby et al. (2007)
13	15.4	Kaempferol-3-(caffeoyldiglucoside)-7-rhamnoside	332, 398sh, 268, 255	Aaby et al. (2007)
14	21.3	Quercetin-3,7-diglucoside	266, 280, 330	Santos et al. (2014)
15	1.1	Hydroxybenzoic acid		Santos et al. (2014)
16	10.1	Vanillic acid	263, 290	Aaby et al. (2007)
17	14.5	Spincetine glucuronide	270, 340	Aaby et al. (2007)
18	15.0	Dihydro kaempferol hexoside	280, 290	Aaby et al. (2007)
19	16.3	Quercetin-3-O-rutinoside 7-O-glucoside	254, 342	Santos et al. (2014)
20	17.1	Quercetin-3-O-triglucoside	268, 340	Santos et al. (2014)

Peak no corresponds to the phenolic compounds eluted in the chromatogram (Fig. 5)