Table 2.

NMR spectroscopic data (600/150 MHz, CDCl₃) for compounds 3 and 4.

Position	3		4
	1H (J in Hz)	13C	1H (J in Hz)	13C
1	-	172.0, C	-	166.9, C
2	5.93, br s	-	6.30, br s	-
3	3.00, m	52.6, CH	3.68, m	53.6, CH
4	2.49, dd (4.2, 3.6)	52.6, CH	3.04, br d (5.4)	49.2, CH
5	2.74, m	35.1, CH	2.22, m	35.9, CH
6	-	141.2, C	-	57.2, C
7	5.37, br s	122.5, CH	2.74, d (5.4)	60.8, CH
8	3.43, d (10.8)	42.1, CH	2.99, d (10.8, 5.4)	47.0, CH
9	-	86.8, C	-	85.2, C
10	1.96, m	46.4, CH2	2.86, dd (12.6, 8.4)	45.1, CH2
	1.57, m		2.77, dd (12.6, 6.6)
11	1.21, d (6.6)	14.3, CH3	0.93, d (6.6)	12.7, CH3
12	1.78, br s	20.3, CH3	1.17, br s	19.5, CH3
13	6.00, d (10.8)	125.6, CH	6.03, dd (13.2, 10.8)	124.2, CH
14	-	136.2, C	5.21, ddd (13.2, 10.8, 3.6)	138.8, CH
15	2.68, m	37.2, CH2	2.11, m	44.1, CH2
	2.39, m		2.08, m
16	2.69, m	35.5, CH2	1.27, m	29.3, CH
	2.45, m
17	-	212.7, C	1.76, dd (13.2, 1.8)	53.8, CH2
			1.68, dd (13.2, 5.4)
18	5.00, ddd (10.8, 3.6, 3.6)	74.0, CH	-	72.8, C
19	2.10, m	29.1, CH2	7.11, d (15.6)	159.1, CH
	1.53, m
20	2.65, m	31.4, CH2	5.69, d (15.6)	119.1, CH
	2.44, m
21	-	171.8, C	-	172.8, C
22	1.19, m	25.6, CH	1.03, d (6.6)	27.1, CH3
23	0.93, d (6.6)	21.0, CH3	1.33, s	22.0, CH3
24	0.90, d (6.6)	23.9, CH3	-	-
25	1.80, br s	15.9, CH3	-	-
1′	-	-	-	137.0, C
2′/6′	-	-	7.15, br d (7.2)	129.4, CH
3′/5′	-	-	7.30, m	129.0, CH
4′	-	-	7.25, m	127.1, CH
18-OH	3.56, d (3.6)