Table 5.

Levels (mg/kg) of 41 polyphenols (excluding stilbenes) identified in grapevine stems.

Id	Compound Name 1	Minimum Value 2	Maximum Value	Mean Value 3	Standard Deviation	N 4	References
58	Quercetin-3-O-galactoside	1920.34	41,831.70	17,403.61	15,457.56	4	[21,50]
23	Catechin	283.72	98,290.95	14,900.45	27,191.10	12	[9,21,37,50,53,55,69,74,90]
2	Gallic acid	386.54	32,960.41	10,307.36	13,374.20	4	[9,21,34,37,55]
40	Epicatechin	193.61	33,154.03	9251.64	12,435.12	14	[9,21,33,50,53,54,55,69,90]
6	Procyanidin B1	215.36	50,709.00	9216.18	14,385.61	10	[9,33,37,50,53,54,55,69]
19	Procyanidin T2	1388.90	35,015.04	9100.99	8406.54	2	[9,34,50,55,69]
25	Procyanidin B3	186.04	23,108.65	8724.23	5791.29	4	[9,21,55,69]
47	Epicatechin gallate	2371.55	9862.08	6362.96	2950.30	6	[9,21,33,54,55]
18	Procyanidin C1	305.51	9710.00	5007.76	4702.25	2	[9,50,55,69]
82	Quercetin	321.88	8210.20	4266.04	3944.16	2	[21]
24	Caftaric acid	110.35	16,110.62	3373.18	5723.49	6	[33,54,74,87]
26	Procyanidin B4	131.00	4355.20	2243.10	2112.10	2	[69]
39	Procyanidin dimer gallate	110.04	4358.12	2234.08	2124.04	2	[9,33,34,50,54,69]
29	Procyanidin B2	10.49	6670.76	2056.93	2735.52	4	[9,21,50,53,55,69,74]
60	Quercetin-3-O-glucoside	29.88	7270.12	1785.38	2544.06	6	[9,21,37,53,55,90]
69	Quercetin-3-O-rhamnoside	320.20	2820.00	1570.10	1249.90	2	[21]
10	Procyanidin A1	674.91	1833.85	1254.38	579.47	4	[33,50,54]
84	Kaempferol	70.12	1830.57	950.35	880.23	2	[21]
63	Quercetin-3-O-glucuronide	391.52	1424.35	908.82	469.54	6	[33,34,37,54,74]
87	Malvidin-3-O-rutinoside	451.00	628.77	539.89	88.88	4	[33,54]
52	Malvidin-3-O-glucoside	224.88	801.37	513.13	288.25	4	[33,54]
43	p-Coumaric acid	12.00	934.08	473.04	461.04	2	[9,21,55]
35	Caffeic acid	10.18	647.32	328.75	318.57	2	[9,21,55]
38	Prodelphinidin A-type	27.46	292.88	160.17	132.71	2	[33,50,54]
99	Isorhamnetin-3-(6-O-feruloyl)glucoside	81.10	115.07	98.09	16.99	4	[33,54]
86	Malvidin-3-(6-O-caffeoyl)glucoside	47.33	119.20	83.27	35.94	4	[33,54]
71	Kaempferol-3-O-rutinoside	21.99	127.39	74.69	52.70	4	[33,54]
54	Quercetin-3-O-rutinoside	10.55	126.73	65.84	46.33	6	[21,33,34,54,74,90]
79	Kaempferol-3-O-glucoside	20.14	79.08	49.61	29.47	4	[33,54]
36	Syringic acid	6.48	32.23	19.36	12.88	2	[21]
46	Ferulic acid	8.01	25.55	16.78	8.77	2	[9,21,55]
16	1-O-(4-Coumaroyl)-glucose	NQ	NQ	NQ	NQ	0	[53]
20	1-Caffeoyl-β-D-glucose	NQ	NQ	NQ	NQ	0	[53]
21	Ferulic acid pentose	NQ	NQ	NQ	NQ	0	[9,55]
31	Chicoric acid	NQ	NQ	NQ	NQ	0	[9,55]
55	Taxifolin-O-pentoside	NQ	NQ	NQ	NQ	0	[9,55]
56	Taxifolin-3-O-glucoside	NQ	NQ	NQ	NQ	0	[53]
57	Taxifolin-3-O-rhamnoside	NQ	NQ	NQ	NQ	0	[9,34,55,74]
61	Catechin gallate	NQ	NQ	NQ	NQ	0	[53]
77	Quercetin-3-O-arabinose	NQ	NQ	NQ	NQ	0	[50]
91	Dihydrokaempferol-3-O-rhamnoside	NQ	NQ	NQ	NQ	0	[9,55]

¹ Compound 52 is detected using only UV. ² NQ = not quantified by the authors. ³ Fresh and dry weight data were combined for the calculations, without any conversion. ⁴ N = number of data point used in the calculation of the mean value, and made of minimum, maximum, and average values extracted from each reference.