Table 1.

¹H (400 MHz) and ¹³C (100 MHz) NMR data of compounds 1 and 3 (in MeOH-d₄, J in Hz).

No.	1		3
	δC	δH, Mult.	δC	δH, Mult.
1	162.8, C		161.4, C
2	79.8, CH	5.64, dd (10.0, 1.7)	79.2, CH	5.42, d (10.2)
3	122.9, CH	4.99, dt (10.0, 1.0)	120.1, CH	4.90, d (10.2)
4	143.5, C		143.7, C
5	36.7, CH2	2.19, m 2.56, ddd (13.1, 9.9, 3.3)	41.7, CH2	2.73, dd (13.8, 7.2) 2.81, dd (13.8, 7.2)
6	32.9, CH2	1.40, m 2.00, m	125.2, CH	5.83, dt (15.6, 7.2)
7	70.1, CH	3.83, dd (10.7, 6.3)	140.2, CH	5.68, d (15.6)
8	155.1, C		72.6, C
9	31.3, CH2	2.13, m 2.37, (13.7, 7.9, 2.8)	39.6, CH2	1.81, m
10	31.7, CH2	1.41, m	24.1, CH2	1.64, m 1.77, m
11	62.1, CH	2.69, dd (10.3, 2.6)	62.0, CH	2.76, m
12	61.1, C		60.1, C
13	35.0, CH2	1.56, m 1.91, m	35.7, CH2	1.27, m 1.9, m
14	22.4, CH2	2.27, m	23.7, CH2	2.20, m 2.38, m
15	123.7, C		123.8, C
16	174.5, C		174.7, C
17	8.8, CH3	1.79, s	9.1, CH3	1.85, s
18	16.0, CH3	1.91, s	17.4, CH3	1.83, s
19	110.5, CH2	4.92, d (0.9) 5.19, t (1.6)	28.5, CH3	1.41, s
20	17.9, CH3	1.21, s	16.7, CH3	1.29, s