Isolation and Bioactivity Analysis of Ethyl Acetate Extract from Acer tegmentosum Using In Vitro Assay and On-Line Screening HPLC-ABTS⁺ System

Table 3

¹³C-NMR chemical shifts of compounds 1–5 isolated from Acer  tegmentosum.

Number of carbon	1	2	3	4	5
	CD3OD; 100 MHz	CD3OD; 150 MHz	CD3OD; 150 MHz	CD3OD; 150 MHz	CD3OD; 150 MHz
1					130.56
2	158.70	159.44	82.81	79.86	130.83
3	135.65	135.00	69.78	67.47	116.08
4	179.48	180.09	28.47	29.25	156.52
5	163.05	163.19	157.54	157.66	116.08
6	99.88	99.95	96.28	96.38	130.83
7	166.07	166.25	157.78	157.98	36.33
8	94.70	94.84	95.50	95.88	72.20
9	158.43	158.69	156.88	157.35
10	105.63	105.69	100.81	100.06
1′	122.89	123.09	132.19	132.28
2′	117.45	116.54	115.23	115.88
3′	145.95	146.47	146.19	145.76
4′	149.96	149.96	146.21	145.92
5′	116.17	116.54	116.08	115.31
6′	123.03	123.20	120.03	119.38
Sugar-1′′	104.63	109.59			104.39
2′′	72.87	83.41			74.99
3′′	74.13	78.76			77.84
4′′	69.11	88.10			71.67
5′′	66.94	62.64			75.34
6′′					64.70
Galloyl-1′′′					121.37
2′′′					110.16
3′′′					146.44
4′′′					139.78
5′′′					146.44
6′′′					110.16
–COO–					168.31