Table 1.

¹H and ¹³C NMR data of 1~4.

Position	1a		2a		3b		4b
	δC, type	δH, mult. (J in Hz)	δC, type	δH, mult. (J in Hz)	δC, type	δH, mult. (J in Hz)	δC, type	δH, mult. (J in Hz)
1	33.1, CH2	2.55, d (15.2)2.26, d (15.2)	34.2, CH2	2.48, d (16.0)2.30, d (16.0)	55.4, CH	3.12, s	54.9, CH	3.12, s
2	74.5, C		74.2, C		79.0, C		79.2, C
3	107.6, C		107.7, C		105.3, C		104.3, C
4	57.7, C		57.8, C		55.7, CH	3.00, d (12.0)	56.0, CH	3.04, d (12.2)
5	172.1, C		171.6, C		170.8, C		172.3, C
6	110.2, C		110.2, C		109.1, C		109.8, C
7	193.8, C		194.3, C		188.3, C		188.7, C
8	41.1, CH2	2.44, dd (17.0, 13.0)2.33, dd (17.0, 4.0)	42.3, CH2	2.23, dd (16.9, 3.6)2.12, dd (16.9, 14.7)	41.1, CH2	2.58, dd (16.7, 4.8)2.18, dd (16.7, 8.7)	41.7, CH2	2.56, dd (16.8, 13.4)2.29, dd (16.8, 3.5)
9	79.3, CH	4.26, ddd (13.0, 5.9, 4.0)	80.6, CH	4.56, m	80.2, CH	4.93, m	81.5, CH	4.38, ddd (13.4, 7.0, 3.5)
10	128.6, CH	5.47, dd (15.5, 5.9)	129.2, CH	5.45, dd (15.5, 6.3)	128.3, CH	5.43, ddq (15.2, 7.3, 1.7)	128.7, CH	5.57, ddq (15.0, 7.0, 1.7)
11	131.7, CH	5.80, m	130.7, CH	5.76, dq (15.5, 6.5)	131.4, CH	5.76, dqd (15.2, 6.6, 1.0)	132.0, CH	5.73, dqd (15.0, 6.6, 1.0)
12	18.0, CH3	1.72, d (6.3)	18.0, CH3	1.73, d (6.5)	17.9, CH3	1.65, ddd (6.6, 1.7, 0.7)	17.8, CH3	1.66, ddd (6.6, 1.7, 0.7)
13	22.3, CH3	1.11, s	22.6, CH3	1.17, s	20.9, CH3	1.27, s	20.9, CH3	1.25, s
14	19.7, CH3	1.32, s	19.1, CH3	1.29, s
1′	53.9, CH	3.69, s	54.0, CH	3.69, s	48.6, CH	3.67, d (12.0)	48.5, CH	3.67, d (12.2)
2′	80.2, C		80.2, C		81.3, C		81.1, C
3′	171.2, C		170.9, C		104.9, C		105.3, C
4′	108.8, C		108.7, C		60.4, C		60.7, C
5′	192.7, C		193.3, C		202.2, C		202.2, C
6′	102.8, C		102.7, C		105.1, C		105.3, C
7′	168.3, C		168.3, C		174.2, C		174.0, C
8′	122.0, CH	6.45, d (14.8)	121.9, CH	6.45, d (14.8)	120.7, CH	6.56, d (14.8)	120.6, CH	6.53, d (14.8)
9′	139.4, CH	7.16, dd (14.8, 10.9)	139.3, CH	7.17, dd (14.8, 10.8)	142.6, CH	7.28, dd (14.8, 10.9)	142.6, CH	7.29, dd (14.8, 10.9)
10′	132.5, CH	6.33, dd (15.1, 10.9)	132.5, CH	6.32, dd (15.1, 10.8)	132.0, CH	6.38, m	132.0, CH	6.36, m
11′	137.4, CH	6.10, dq (15.1, 6.8)	137.3, CH	6.10, dq (15.1, 6.8)	139.5, CH	6.25, dq (15.1, 6.8)	139.6, CH	6.26, dq (15.0, 6.8)
12′	18.8, CH3	1.86, d (6.8)	18.8, CH3	1.86, d (6.8)	18.8, CH3	1.87, dd (6.8, 1.6)	18.8, CH3	1.87, dd (6.8, 1.6)
13′	26.6, CH3	1.46, s	26.6, CH3	1.46, s	21.5, CH3	1.35, s	21.5, CH3	1.36, s
14′	7.8, CH3	1.62, s	7.9, CH3	1.59, s	20.1, CH3	1.31, s	19.9, CH3	1.31, s

^aRecorded in CD₃OD,

^bRecorded in CD₃COCD₃.