Table 1. NMR spectroscopic data of compound 1 .

Position	δ C	δ H ( J )	Position	δ C	δ H ( J )
2	165.47	-	1"	100.79	5.07,(d,8.4)
3	106.82	6.59, s	2"	83.22	*
4	183.37	-	3"	74.69	*
5	152.93	-	4"	70.46	*
6	116.02	-	5"	76.45	*
7	172.08	-	6"	64.03	*
8	102.80	6.70, s	1'"	103.55	4.54
8a	150.78	-	2'"	72.03	*
4a	101.57	-	3'"	67.33	*
9 prenyl	22.76	overlapped	4'"	71.55	*
10	122.90	5.36, br t	5'"	72.41	*
11	128.68	-	6'"	63.77	*
12	19.95	1.34, s	-	-	-
13	25.01	1.29, s	-	-	-
1'	122.13	-	-	-	-
2'	128.86	7.89,(d,8.4)	-	-	-
3'	116.02	6.94,(d,8.4)	-	-	-
4'	161.87	-	-	-	-
5'	116.02	6.94,(d,8.4)	-	-	-
6'	128.86	7.89,(d,8.4)	-	-	-
OCO-CH3	20.01	2.19, s	-	-	-
OCO-CH3	176.82	-	-	-	-

¹H (200MHz) and ¹³C (50MHz) in CD₃OD, δ in ppm, J in Hz) ; * overlapping signals in 3.5-4.5ppm.