Journal of Wood Science

Official Journal of the Japan Wood Research Society

Table 2 ¹H and ¹³C NMR peak lists and signal assignments of isolated compounds 2 and 3

From: Isolation, structure determination and structure–activity relationship of anti-toxoplasma triterpenoids from Quercus crispula Blume outer bark

	Compound 2		Compound 3
Position	¹H	¹³C	¹H	¹³C
1	* and ***	38.1	† and †††	38.3
2	*** and 1.87–1.90 m	23.5	‡ and ‡‡	23.6
3	4.49 m	80.9	4.50 dd (J = 9.8, 6.3 Hz)	80.9
4	–	37.7	–	37.7
5	0.83–0.88 m	55.3	0.82–0.91 m	55.2
6	and *	18.2	†† and †††	18.2
7	**	32.6	†† and †††	32.8
8	–	39.3	–	39.5
9	***	47.6	†††	47.5
10	–	37.0	–	36.9
11	*** and 1.87–1.90 m	23.4	‡ and ‡‡	23.3
12	5.28 t (J = 3.5 Hz)	122.6	5.24 t (J = 3.5 Hz)	125.7
13	–	143.6	–	138.0
14	–	41.6	–	41.9
15	* and ***	27.7	† and ‡‡	28.0
16	** and 1.99 dt (J = 13.6, 13.6, 3.9 Hz)	22.9	‡‡ and 2.01 dt (J = 13.5, 13.5, 4.0 Hz)	24.1
17	–	46.5	–	48.0
18	2.82 dd (J = 13.6, 4.1 Hz)	41.0	2.18 d (J = 11.2 Hz)	52.5
19	* and ***	45.9	††	39.0
20	–	30.7	††	38.8
21	**	33.8	†† and †††	30.6
22	***	32.4	‡	36.7
23	0.85 s	16.7	0.85 s	16.7
24	0.87 s	28.0	0.87 s	28.1
25	0.94 s	15.4	0.96 s	15.5
26	0.76 s	17.1	0.77 s	17.0
27	1.13 s	25.9	1.07 s	23.6
28	–	182.7	–	183.5
29	0.93 s	23.6	0.86 d (J = 5.6 Hz)	17.1
30	0.91 s	33.1	0.95 d (J = 6.3 Hz)	21.2
acetyl CH₃	2.05 s	21.3	2.05 s	21.3
acetyl C=O	–	171.0	–	171.1

* 1.00–1.13 ppm; ** 1.17–1.48 ppm; *** 1.52–1.81 ppm
†: 1.03–1.19 ppm; ††: 1.25–1.39 ppm; †††: 1.46–1.58 ppm; ‡: 1.60–1.73 ppm; ‡‡: 1.83–1.92 ppm

Back to article page