¹H and ¹³C-NMR spectrum data of compounds 2 and 3 in pyridine-d₅^a.

No.	2b		3c
	δ H J (Hz)	δ C	δ H J (Hz)	δ C
1	1.07 o	39.1	1.60 o	38.8
	1.61 (d, 13.2)		1.04 o
2	1.89 m	28.5	2.05 m	28.3
	2.00 m		1.93 m
3	3.64 m	80.2	3.69 (dd, 11.7, 4.0)	79.9
4	—	43.2	—	42.9
5	1.07 (d, 11.8)	56.2	1.05 o	56.0
6	1.62 o, 1.76 o	19.3	1.47 (dd, 12.6, 3.9), 1.80 m	19.2
7	2.04 (d, 13.4), 2.12 (dd, 13.4, 3.5)	37.2	2.09 m, 2.20 m	36.9
8	—	41.5	—	41.1
9	1.80 o	47.4	1.80 o	47.2
10	—	37.1	—	37.0
11	1.87 o, 1.94 m	24.4	1.81 m, 1.96 m	24.1
12	5.63 brs	124.0	5.55 brs	124.5
13	—	144.1	—	144.2
14	—	48.1	—	47.7
15	4.35 (dd, 8.3, 4.5)	67.6	4.33 (dd, 8.3, 4.3)	67.3
16	4.77 brs	72.7	4.81 brs	72.3
17	—	47.5	—	48.2
18	2.97 (dd, 14.1, 3.8)	41.8	2.99 (dd, 14.2, 3.8)	41.2
19	1.50 (dd, 13.3, 3.8)	47.2	1.47 (dd, 13.6, 3.9)	47.2
	3.10 (dd, 14.1, 13.8)		3.13 (dd, 14.2, 13.6)
20	—	36.4	—	36.1
21	4.89 (d, 9.5)	78.4	6.51 (d, 10.0)	81.5
22	4.48 (d, 9.5)	73.5	4.87 (d, 10.0)	72.5
23	1.54 s	23.6	1.56 s	23.3
24	3.70 (d, 10.5), 4.52 (d, 10.5)	64.6	4.54 (d, 10.4), 3.71 (d, 10.4)	64.4
25	0.94 s	16.4	0.96 s	16.2
26	1.20 s	17.7	1.06 s	17.3
27	1.87 s	21.1	1.87 s	20.9
28	4.43 (d, 10.6)	66.3	4.08 (dd, 10.2, 4.6)	65.1
	4.60 (d, 10.6)		3.81 (dd, 10.2, 3.2)
29	1.39 s	30.6	1.15 s	29.6
30	1.45 s	19.4	1.37 s	20.1
C-21-Tig-1′			—	167.0
2′			—	130.0
3′			7.03 (qd, 7.08, 1.4)	137.0
4′			1.61 (d, 7.0)	14.2
5′			1.87 s	12.6
C-28-Tig-1′	—	167.7
2′	—	129.1
3′	6.98 (qd, 7.12, 1.4)	137.1
4′	1.56 (d, 7.0)	14.1
5′	1.80 s	12.2

^a“o” overlapped.

^b600 MHz for ¹H-NMR, 150 MHz for ¹³C-NMR.

^c400 MHz for ¹H-NMR, 100 MHz for ¹³C-NMR.