Table 2.

¹³C nuclear magnetic resonance (NMR) chemical shifts of Compounds 1, 2, 3, and 4 in dimethyl sulfoxide (DMSO)-d6

Carbon position	1(C-K)	2	3	4
1	38.98	39.45	39.43	36.63
2	27.64	34.10	27.60	27.71
3	77.22	216.85	76.60	77.21
4	39.03	47.06	42.39	38.53
5	55.81	54.68	147.37	55.28
6	18.40	19.63	119.09	125.07
7	34.82	34.10	34.44	135.79
8	39.69	39.45	36.78	43.77
9	50.90	48.82	51.04	50.57
10	37.00	36.64	37.24	35.84
11	30.53	30.98	32.20	29.06
12	69.41	69.34	69.25	70.17
13	48.91	49.08	46.55	47.69
14	51.17	51.20	50.73	50.43
15	30.53	30.55	31.08	30.09
16	26.18	26.17	26.25	25.87
17	49.69	50.86	48.92	49.00
18	16.01	15.66	16.89	17.11
19	28.60	15.99	20.26	17.81
20	82.49	82.51	82.53	82.44
21	21.99	22.00	22.12	21.86
22	35.77	35.79	35.95	35.43
23	22.64	22.64	22.71	22.57
24	125.78	125.78	125.74	125.79
25	130.62	130.62	130.63	130.64
26	18.05	18.04	18.04	18.02
27	25.98	25.95	25.94	25.94
28	16.30	26.90	28.70	28.27
29	16.28	21.20	23.72	16.60
30	17.41	17.34	18.00	19.32
20-iner-glc
1′	97.02	97.03	97.08	97.00
2′	74.29	74.32	74.28	74.36
3′	77.72	77.74	77.63	77.80
4′	70.56	70.62	70.55	70.61
5′	77.09	77.08	77.06	77.06
6′	61.60	61.66	61.59	61.66