Table 3.

¹H and ¹³C-NMR data for 5 in CD₃OD (δ in ppm, J in Hz).

No.	5
	δ H a,b	δ C c
1	-	173.8 C
3	5.24 (2H, s)	70.8 CH2
3a	-	146.8 C
4	-	117.8 C
5	-	164.9 C
6	-	124.0 C
7	-	154.9 C
7a	-	107.7 C
8	2.15 (3H, s)	11.5 CH3
5-OMe	3.79 (3H, s)	61.6 CH3
1′	2.71 (2H, m)	22.5 CH2
2′	1.65 (1H, m); 1.88 (1H, m)	34.6 CH2
3′	2.44 (1H, m)	40.8 CH
4′	-	180.9 C
5′	1.20 (3H, d, J = 7.0 Hz)	17.6 CH3

^a Recorded at 400 MHz; ^b “m” means overlapped or multiplet with other signals; ^c Recorded at 100 MHz.