Table 1.

¹H and ¹³C NMR assignments for compounds 1–3 (mult., J in Hz).

No.	1 a		2 a		3 a
	δ C	δ H	δ C	δ H	δ C	δ H
2	167.2		167.2		167.2
3	89.3	5.57 d (2.4)	88.8	5.55 d (1.8)	88.8	5.55 d (1.8)
4	173.7		173.9		173.9
5	102.0	6.54 dd (0.6, 2.4)	100.1	6.21 dd (0.6, 1.8)	100.1	6.21 dd (0.6, 1.8)
6	165.6		169.0		169.0
7	75.4	4.52 t (6.0)	71.3	4.35 dd (4.8, 7.8)	71.3	4.35 dd (4.8, 7.8)
8	35.0	1.84 dt (6.0, 7.2)	32.7	1.68 m 1.96 m	32.7	1.78 m 1.87 m
9	28.6	1.40–1.43 m	35.7	1.47–1.59 m	35.7	1.48–1.59 m
10	23.6	1.34–1.40 m	68.6	3.74 dd (6.6, 12.6)	68.6	3.74 dd (6.0, 12.6)
11	14.3	0.92 t (7.2)	23.6	1.16 d (6.6)	23.6	1.16 d (6.0)
12	57.1	3.87 s	57.1	3.87 s	57.1,	3.87 s
1′	98.3	4.81 d (3.6)
2′	73.4	3.41 dd (3.6, 9.6)
3′	74.9	3.68 dd (9.6, 9.6)
4′	71.9	3.29 dd (9.6, 9.6)
5′	74.8	3.67 ddd (2.4, 5.4, 9.6)
6′	62.8	3.68 dd (5.4, 12.0) 3.83 dd (2.4, 12.0)

^aData were measured in CD₃OD at 600 MHz for ¹H and 150 MHz for ¹³C.