Chemical Constituents of Root Barks of Gnidia involucrata and Evaluation for Antibacterial and Antioxidant Activities

Table 2

¹H- and ¹³C-NMR (CDCl₃) spectral data of compound 2 and literature reported for closely related compounds [26].

No.	^1H-NMR spectral data of compound 2	^1H-NMR literature data [26]	^13C-NMR spectral data of compound 2	^13C-NMR literature data [26]
1	7.58 (1H, s)	7.57 (1H, s)	160.8	161
2	—	—	132.8	133
3	—	—	209.3	209.1
4	—	—	73.7	74
5(a)	2.47 (1H, d)	2.46 (1H, d)	38.4	38.9
5(b)	2.59 (1H, d)	2.53 (1H, d)
6	—		140.7	140.7
7	5.69 (1H, br.s)	5.66 (1H, d)	129.2	129.5
8	3.29 (1H, m)	3.22 (1H, dd)	38.9	39.3
9	—		78.4	78.4
10	3.24 (1H, br.s)	3.23 (1H, s)	56.0	56.4
11	2.16 (1H, m)	2.15 (1H, m)	43.0	43.4
12	5.43 (1H, d)	5.44 (1H, d)	76.6	76.8
13	—		65.7	66
14	1.09 (1H, d)	1.08 (1H, d)	36.3	36.6
15	—		25.7	26
16	1.25 (3H, s)	1.24 (3H, s)	23.8	24
17	1.2 (3H, s)	1.19 (3H, s)	16.8	17
18	0.88 (3H, d)	0.87 (3H, d)	14.4	14.6
19	1.74 (3H, s)	1.75 (3H, d)	10.1	10.3
20(a)	3.95 (1H, d)	3.97 (1H, d)	68.0	68.3
20(b)	4.02 (1H, d)	4.02 (1H, d)
1′	—		167.2	167.3
2′	5.76 (1H, d)	5.76 (1H, d)	118.8	119.1
3′	7.21 (1H, dd)	7.21 (1H, dd)	145.7	145.8
4′	5.69 (1H, br.s)	6.16 (1H, dd)	128.3	128.5
5′	6.16 (1H, m)	6.13 (1H, m)	145.3	145.5
6′	2.14 (2H, m)	2.13 (2H, m)	33.0	33.3
7′	1.40 (2H, m)	1.41 (2H, m)	32.9	28.6
8′–11′	1.27 (8H, m)	1.28 (4H, m)	31.8–22.6	31.6
12′	0.88 (3H, t)	0.86 (3H, t)	14.1	14.2
1″			173.9	174
2″	2.10 (3H, s)	2.08 (3H, s)	21.1	21.3