Table 1. ¹H NMR and ¹³C NMR data of compounds 1 in MeOH-d₄.

Position	dH (J in Hz)(ppm)	dC(ppm)
2	-	165.2
3	6.82	103.82
4	-	182.78
5	-	162.44
6	6.43(d, J=2.1)	100.35
7	-	163.80
8	6.77(d, J=2.1)	95.5
9	-	157.79
10	-	106
1'	-	121.60
2'	7.92(d, J=8.15)	129.35
3'	6.92(d, J=8.15)	116.86
4'	-	162.4
5'	6.92(d, J=8.15)	116.86
6'	7.92(d, J=8.15)	129.35
ß-D-glucuronide (at C-7)
1''	5.15	100.35
2''	m*	73.77
3''	m	74.98
4''	m	72.78
5''	4.25(d, J=9)	77.2
6''	-	173.49

*multiple