Table 1.

¹H and ¹³C NMR data for compounds 1–3 in DMSO-d₆ ^a.

No.	1		2		3
	δH (J in Hz)	δ C	δH (J in Hz)	δ C	δH (J in Hz)	δ C
1	1.24, overlap	59.3, CH		113.9, C		113.2, C
2	4.22, brs	64.6, CH		161.2, C		162.0, C
3	α 1.12, dd (11.4, 3.7) β 1.67, m	28.5, CH2		113.9, C	6.59, s	102.1, CH
4	1.55, m	46.2, CH		161.0, C		161.3, C
5		44.2, C	6.75, d (9.0)	106.2, CH		118.5, C
6	α 1.19, m β 1.63, m	31.8, CH2	7.77, d (9.0)	130.2, CH	7.71, s	131.8, CH
7	α 1.38, m β 1.71, overlap	26.2, CH2		203.9, C		205.3, C
8		137.3, C	2.58, s	26.4, CH3	2.97, t (7.3)	37.6, CH2
9	5.69, brs	124.1, CH	2.05, s	7.8, CH3	1.62, m	24.1, CH2
10	α 1.79, overlap β 2.07, dt (18.9, 3.0)	34.5, CH2			1.35, m	25.2, CH2
11	1.61, m	29.8, CH			1.45, m	32.3, CH2
12	0.88, d (6.5)	23.3, CH3			3.39, dt (6.3, 11.5)	60.6, CH2
13	0.83, d (6.5)	22.8, CH3			2.13, s	15.3, CH3
14	0.80, d (6.7)	14.2, CH3
15	α 4.08, d (13.0) β 4.01, d (13.0)	66.6, CH2
2-OH	4.54, d (6.0)		12.84, s		12.51, s
12-OH					4.33, t (5.1)
1′	4.65, d (3.4)	96.1, CH	5.75, d (4.4)	99.9, CH	5.71, d (4.4)	99.7, CH
2′	3.65, td (8.1, 3.4)	53.9, CH	4.11, m	71.4, CH	4.11, m	71.4, CH
3′	3.45, dd (10.9, 8.1)	70.8, CH	3.96, overlap	69.1, CH	3.96, overlap	69.1, CH
4′	3.15, d (9.0)	70.6, CH	3.98, overlap	86.5, CH	3.96, overlap	86.5, CH
5′	3.39, ddd (10.0, 5.4, 2.3)	72.9, CH	3.47, d (3.6)	61.4, CH2	3.47, dd (3.6, 4.9)	61.4, CH2
6′	α 3.49, overlapped β 3.60, m	60.8, CH2
7′		169.3, C
8′	1.82, s	22.6, CH3
2′-OH			4.61, brs		4.56, d (8.7)
2′-NH	7.60, d (8.1)
3′-OH	4.80, brs		4.95, brs		4.92, d (4.6)
4′-OH	5.03, brs
5′-OH			4.80, brs		4.81, t (4.9)
6′-OH	4.46, dd (11.8, 3.5)

^{a 1}H and ¹³C data were recorded at 500 and 125 MHz, respectively.