Table 3.

¹H and ¹³C NMR spectroscopic data for compounds 7–9 in acetone-d₆ (δ in ppm, J in Hz)

No	7 b		8 a		9 a
	δC, type	δH (J in Hz)	δC, type	δH (J in Hz)	δC, type	δH (J in Hz)
1	113.7, C		115.6, C		113.9, C
2	139.1, C		139.1, C		156.7, C
3	109.3, CH	6.11, d (2.3)	109.6, CH	6.13, d (2.2)	108.4, CH	6.19, s
4	157.0, C		157.0, C		136.5, C
5	100.6, CH	6.09, d (2.3)	100.7, CH	6.07, d (2.2)	108.4, CH	6.19, s
6	158.6, C		158.6, C		156.7, C
7	20.0, CH3	2.01, s	20.9, CH3	2.36, s	21.2, CH3	2.10, s
8	33.9, CH	3.22, br. s	30.3, CH	3.52, br. s	18.2, CH2	2.67, m
9	38.9, CH2	1.97–2.00, dd (12.8, 3.0)	40.4, CH2	1.87, dd (12.8, 3.2)	41.2, CH2	1.66–1.70, m
		1.69–1.73, dd (12.8, 3.0)		1.62, dd (12.8, 8.0)
10	74.2, C		74.5, C		72.6, C
11	40.8, CH2	1.89, br. d (11.0)	41.5, CH2	1.89–1.92, m	42.6, CH2	1.50–1.54, m
		1.62–1.64, m		1.53–1.56*
12	24.6, CH2	1.49–1.55, m	21.6, CH2	1.53–1.56*	23.3, CH2	2.10–2.15, m
		1.20–1.34, m		1.31–1.35, m
13	48.7, CH	2.34, dt (12.5, 2.7)	55.9, CH	1.76, dt (12.8, 2.0)	125.9, CH	5.15, t (6.9)
14	152.5, C		74.0, C		135.0, C
15	37.4, CH2	2.09–2.25*	36.8, CH2	1.35–1.42,m	40.4, CH2	1.96, t (7.5)
				1.00, m
16	27.7, CH2	2.09–2.25*	23.0, CH2	2.09–2.14, m	27.4, CH2	2.07*
				1.96–2.01, m
17	125.2, CH	5.16, t (6.6)	126.1, CH	4.98, t (7.0)	125.1, CH	5.10, t (7.1)
18	131.9, C		130.9, C		131.6, C
19	17.7, CH3	1.60, s	17.6, CH3	1.56, s	17.7, CH3	1.58, s
20	25.8, CH3	1.66, br. s	25.8, CH3	1.59, s	25.8, CH3	1.65, s
21	109.7, CH2	4.64, br. s	27.3, CH3	1.13, s	15.9, CH3	1.62, s
		4.28, br. s
22	29.1, CH3	1.28, s	29.0, CH3	1.26, s	27.5, CH3	1.20. s
4-O H		7.96, s		7.91, s		8.05, s
6-O H						8.05, s
10-O H						3.54, s
14-O H				3.30, s

^a1H NMR spectra were measured at 400 MHz, and ¹³C NMR spectra at 100 MHz

^b1H NMR spectra was measured at 500 MHz, and ¹³C NMR spectra at 125 MHz

* Signals were overlapped