Table 1.

¹³C and ¹H NMR spectroscopic data (125/500 MHz) for 1–2 in dimethyl sulfoxide (DMSO)-d₆ (δ in ppm).

	1		2
	δC	δH (J, Hz)	δC	δH (J, Hz)
1	70.8	3.34, 1H, br s	70.7	3.34, 1H, br s
2	36.1	1.84, 1H, m 1.60, 1H, m	36.0	1.84, 1H, m 1.59, 1H, m
3	78.8	4.40, 1H, dd, 12.0, 4.5	78.8	4.40, 1H, dd, 12.0, 4.5
4	53.0	_	52.9	_
5	36.6	2.41, 1H, dd, 13.0, 4.5	36.5	2.42,1H, dd, 12.5, 3.5
6	22.0	1.14, 1H, m 0.84, 1H, m	21.9	1.16, 1H, m 0.83, 1H, m
7	25.1	1.02, 2H, m	25.0	1.02, 2H, m
8	47.5	1.43, 1H, m	47.3	1.46, 1H, m
9	20.1	-	19.9	-
10	28.9	-	28.7
11	25.0	2.27, 1H, m 1.17, 1H, m	24.9	2.27, 1H, m 1.19, 1H, m
12	32.6	1.55–1.57, 2H, m	32.8	1.56–1.60, 2H, m
13	44.8	-	44.7	-
14	48.7	-	48.6	-
15	35.3	1.21–1.22, 2H, m	35.2	1.26–1.29, 2H, m
16	27.8	1.84, 1H, m 1.22, 1H, m	27.6	1.84, 1H, m 1.23, 1H, m
17	51.9	1.54, 1H, m	51.6	1.57, 1H, m
18	18.0	0.91, 3H, s	17.8	0.90, 3H, m
19	28.8	0.36, 1H, d, 4.0 0.56, 1H, d, 4.0	28.7	0.35, 1H, d, 4.0 0.57, 1H, d, 4.0
20	36.4	1.26, 1H, m	36.0	1.29, 1H, m
21	18.3	0.82, 3H, s	18.2	0.85, 3H, s
22	29.0	1.43, 1H, m 0.92, 1H, m	29.0	1.45, 1H, m 1.00, 1H, m
23	30.8	1.43, 1H, m 1.23, 1H, m	30.9	1.45, 1H, m 1.30, 1H, m
24	74.6	-	73.4	_
25	32.3	1.70, 1H, m	32.4	1.72, 1H, m
26	17.1	0.80–0.82, 3H, m	16.8	0.80–0.85, 3H, m
27	17.1	0.80–0.82, 3H, m	16.7	0.80–0.85, 3H, m
28	178.5		178.6
29	9.5	0.97, 3H, s	9.5	0.97, 3H, s
30	19.1	0.89, 3H, s	19.0	0.91, 3H, s
31	64.7	3.25, 2H, m	66.9	3.89, 1H, d, 11.0 3.85, 2H, d, 11.0
1’	104.1	4.14, 1H, d, 7.5	104.0	4.15, 1H, d, 7.5
2’	73.7	2.88, 1H, dd, 9.0, 7.5	73.5	2.88, 1H, t, 8.5
3’	76.4	3.05, 1H, t, 9.0	76.3	3.06, 1H, t, 8.5
4’	69.6	3.23, 1H, m	69.5	3.24, 1H, m
5’	65.7	3.66, 1H, dd, 11.5, 5.0	65.6	3.66, 1H, dd, 11.0, 5.0
		2.97, 1H, t, 11.5		2.97, 1H, t, 11.0
OAc			20.7	1.99, 3H, s
			170.3