Table 2.

¹H NMR data (500 MHz) and ¹³C NMR data (125 MHz) of 3 and 4.

No.	3 a		4 b
	δC	δH	δC	δH
1	172.9 C		170.6 C
3	70.0 CH2	5.18, s	69.2 CH2	5.30, s
3a	144.1 C		147.5 C
4	116.7 C		117.0 C
5	163.8 C		162.8 C
6	122.5 C		117.9 C
7	153.7 C		153.5 C
7a	106.3 C		107.8 C
8	11.6 CH3	2.13, s	11.3 CH3	2.09, s
9	61.1 CH3	3.77, s	60.6 CH3	3.67, s
1′	21.3 CH2	2.66, m	118.2 CH	6.63, d (16.5)
2′	33.1 CH2	1.90, m	137.4 CH	6.76, d (16.1)
		1.67, m
3′	39.4 CH	2.50, dq (6.9, 6.9)	85.8 C
4′	177.0 C		34.0 CH2	2.24, m
				2.19, m
5′	51.6 CH3	3.68, s	28.8 CH2	2.64, m
				2.56, m
6′	17.1 CH3	1.21 d (1.2)	177.0 C
7′			26.4 CH3	1.55, s

^a CDCl₃ used as solvent. ^b DMSO-d₆ used as solvent.