Table 2.

¹³C-NMR data for 3, 4, 6, and 7 in CD₃OD (δ in ppm).

No.	3 a	4 b	6 a	7 a
1	171.0 CO	170.6 CO	173.4 C	173.8 C
3	104.6 CH	98.3 CH	70.6 CH2	70.8 CH2
3a	143.4 C	142.8 C	146.2 C	146.6 C
4	120.5 C	119.9 C	117.6 C	117.9 C
5	165.2 C	164.4 C	164.4 C	164.8 C
6	126.1 C	124.7 C	123.2 C	123.7 C
7	154.6 C	153.6 C	154.2 C	154.7 C
7a	108.7 C	107.1 C	107.3 C	107.7 C
8	11.1 CH3	11.4 CH3	11.4 CH3	11.4 CH3
3-OMe	56.4 CH3	-	-	-
5-OMe	61.6 CH3	61.2 CH3	61.5 CH3	61.5 CH3
1′	23.8 CH2	22.9 CH2	23.4 CH2	23.6 CH2
2′	123.9 CH	122.6 CH	124.2 CH	124.5 CH
3′	135.4 C	134.6 C	134.7 C	135.1 C
4′	36.0 CH2	34.8 CH2	35.4 CH2	36.6 CH2
5′	34.3 CH2	33.1 CH2	33.6 CH2	35.8 CH2
6′	178.0 C	174.1 C	174.8 C	175.8 C
7′	16.3 CH3	16.4 CH3	16.2 CH3	16.3 CH3
8′	-	-	66.3 CH2	-
9′	-	-	70.9 CH	-
10′	-	-	63.9 CH2	-
6′-OMe	-	51.8 CH3	-	-
2″	-	-	-	39.8 CH2
3″	-	-	-	25.9 CH2
4″	-	-	-	32.5 CH2
5″	-	-	-	177.2 C

^a Recorded at 100 MHz; ^b Recorded at 150 MHz.