Table 2. Quantitative HPLC analyses of phenolic compounds in the Cudrania tricuspidata stem (CTS) extract.

Phenolic	Peak area			Contents of phenolic compound (mg/g)
compounds	#1	#2	#3	#1	#2	#3	Average	SD
Chlorogenic acid	89,062.62	93,515.91	92,651.37	62.54	65.67	65.06	64.42	1.66
(+)-Catechin	484.22	431.78	424.37	1.04	0.94	0.93	0.97	0.06
Caffeic acid	37,200.83	37,207.60	36,255.37	12.21	12.21	11.90	12.11	0.18
Phloretic acid	1,378.75	1,559.26	1,425.37	2.72	3.08	2.82	2.88	0.19
Veratric acid	22,186.75	22,509.57	22,365.37	14.04	14.24	14.15	14.14	0.10
Hesperidin	10,541.11	10,737.77	10,657.37	7.45	7.59	7.54	7.53	0.07
Quercetin	1,751.90	1,832.04	1,789.37	1.43	1.49	1.46	1.46	0.03
Naringenin	2,255.98	2,493.72	2,565.37	0.77	0.86	0.88	0.84	0.06
Total				102.21	106.10	104.74	104.35	1.97

The seventeen kinds of the phenolic acid composition of the sample were analyzed by comparing the spectrum of the sample and standards components matched to create a standard curve from Peak area per component to quantify the amount of change. Quantitative HPLC analyses of phenolic compounds were performed three times.