Table 2.

¹H (300 MHz, CDCl₃) and ¹³C (75 MHz, CDCl₃) NMR Data of Compounds 2–4

	compound 2		compound 3		compound 4
position	δ C	δ H	δ C	δ H	δ C	δ H
1	172.7 qC		105.0 CH	4.10, d (8.5)	172.3 qC
3	66.5 CH2	4.53, br s	66.0 CH2	4.53, br s	66.5 CH2	4.53, br s
4	139.5 qC		140.2 qC		140.1 qC
4a	39.9 CH	3.30, m	44.2 CH	2.80, dd (7,12)	44.0 CH	2.72, m
5	32.5 CH2	1.45, m 1.65, m	35.8 CH2	2.33, m	35.9 CH2	2.16, m
6	39.9 CH2	2.10, m	39.9 CH2	1.86, m 2.02, m	39.9 CH2	1.90, m 2.01,m
7	136.0 qC		135.0 qC		135.5 qC
8	124.6 CH	5.42, m	124.0 CH	5.43, m	124.5 CH	5.43, m
9	28.9 CH2	2.10, m 2.40, m	28.7 CH2	2.09, m 2.11, m	28.9 CH2	2.10, m 2.38, m
10	32.6 CH2	2.22, m 2.43, m	30.8 CH2	2.16, m 2.20, m	32.6 CH2	2.16, m 2.23, m
11	144.2 qC		144.0 qC		144.5 qC
11a	61.7 CH	3.12, d (11.0)	56.1 CH	1.98, d (12)	61.8 CH	3.13, d (12.0)
12	130.0 CH	5.43, m	127.0 CH	6.00, d (11.0)	128.0 CH	6.02, d (11.0)
13	28.0 CH2	2.80, m 2.85, m	120.0 CH	6.43, dd (11,15)	121.0 CH	6.40, dd (11,15)
14	121.0 CH	5.11, m	144.2 CH	5.93, d (15.0)	144.0 CH	5.70, d (15.0)
15	133.5 qC		70.8 qC		71.5 qC
16	18.0 CH3	1.64, d (1.1)	29.4 CH3	1.35, s	29.5 CH3	1.34, s
17	25.5 CH3	1.72, d (1.1)	29.4 CH3	1.35, s	29.5 CH3	1.35, s
18	18.3 CH3	1.55, s	18.2 CH3	1.72, s	19.0 CH3	1.60, s
19	120.2 CH2	5.04, s 5.10, s	111.0 CH2	4.65, s 4.80, s	120.1 CH2	5.04, s 5.10, s
CH3 of CH3COO	21.4 CH3	2.06, s	21.2 CH3	2.07, s	21.2 CH3	2.04, s
CO of CH3COO	170.8 qC		170.9 qC		170.4 qC
CH3 of CH3OCO	51.4 CH3	3.56, s			51.2 CH3	3.48, s
CO of CH3OCO	172.7 qC				172.3 qC
CH3O			56.0 CH3	3.38, s
CH3O			55.0 CH3	3.47, s