Table 1.

¹H (125 MHz) and ¹³C NMR (500 MHz) data of Compounds 1–3 (δ in ppm, J in Hz).

No.	1 a		2 a		3 b
	1H	13C	1H	13C	1H	13C
1	7.75, s		7.73, s		9.79, s
2		151.8, C		149.9, C		151.8, C
3		51.8, C		51.2, C		53.9, C
4		40.1, C		38.1, C		38.6, C
5	α 2.79, m	27.2, CH2	α 2.59, d (14.8)	37.5, CH2	α 1.80, m	24.7, CH2
	β 1.72, m		β 2.17, d (5.2)		β 1.73, m
6	α 2.82, m	28.4, CH2	4.15, d (5.0)	70.4, CH	α 1.89, m	23.3, CH2
	β 2.05, m				β 1.69, m
7		104.5, C		103.3, C	4.88, dd (10.7, 4.3)	75.9, CH
8						40.0, C
9	4.33, s	88.2, CH	4.37, s	88.4, CH	1.51, br.s	41.0, CH
10		197.2, C		195.2, C	α 1.79, m	28.0, CH2
					β1.72, m
11	5.86, s	117.8, CH	5.87, s	118.7, CH	α 1.80, m	33.1, CH2
					β 1.68, m
12		169.8, C		171.3, C	2.80, m	49.8, CH
13		77.8, C	3.68, dt (3.4, 11.7)	39.5, CH	α 2.36, dd (13.1, 10.9)	28.0, CH2
					β 2.68, dd (13.1, 6.4)
14	α 2.05, m	34.5, CH2	α 1.97, m	24.1, CH2		117.9, C
	β 1.92, m		β 1.48, m
15	α 2.05, m	21.3, CH2	α 1.85, m	24.0, CH2		131.5, C
	β 1.72, m		β 1.77, m
16	2.64, m	48.6, CH	2.83, m	48.4, CH	7.36, d (7.4)	118.8, CH
17	α 2.79, dd (12.4, 5.6)	27.8, CH2	α 2.74, dd (13.2, 6.3)	27.8, CH2	6.99, dt (7.1, 1.6)	119.7, CH
	β 2.05, dd (12.4, 3.1)		β 2.41, dd (13.2, 10.6)
18		117.8, C		118.5. C	6.99, dt (7.1, 1.6)	120.6, CH
19		123.6, C		125.3, C	7.32, d (7.3)	112.6, C
20	7.56, s	114.1, CH	7.46, d (7.9)	119.9, CH	7.32, d (7.3)	141.7, C
21		136.8, C	7.11, t (6.2)	120.8, CH	1.10, s	15.0, CH3
22	5.19, s	76.3, CH	7.11, t (6.2)	121.5, CH	1.18, s	19.4, CH3
23		144.8, C	7.34, d (8.2)	111.7, CH	0.95, s	18.1, CH3
24		73.8, C		140.3, C	α 1.52, m	29.9, CH2
					β 1.23, m
25			1.16, s	15.5, CH3	α 2.08, m	22.1, CH2
					β 1.80, m
26		71.3, C	1.18, s	21.6, CH3	5.11, t (7.1)	125.5, CH
27	α 2.45, d (18.0)	34.1, CH2		79.8, C		126.1, C
	β 2.43, d (18.0)
28		138.4, C	1.44, s	28.7, CH3	1.63, s	25.9, CH3
29		133.9, C	1.24, s	23.2, CH3	1.69, s	17.6, CH3
30	7.02, s	102.1, CH				170.6, C
31		140.0, C			2.05, s	21.1, CH3
32	1.37, s	16.3, CH3
33	1.25, s	23.8, CH3
34		78.9, C
35	1.20, s	23.2, CH3
36	1.46, s	29.0, CH3
37	1.55, s	30.4, CH3
38	1.50, s	30.0, CH3
39	1.29, s	29.7, CH3
40	1.37, s	29.5, CH3

^a Measured in CDCl₃. ^b Measured in acetone-d₆.