Table 2. ¹H and ¹³C NMR Data of Compounds 3 and 4 in CD₃CN-d₃.

	3		4
no.	δC	δH (J in Hz)	δC	δH (J in Hz)
1	167.6 C		167.6 C
2	104.8 C		104.8 C
3	148.8 C		148.9 C
4	142.8 C		142.2 C
5	137.9 C		137.6 C
6	116.7 CH	6.89 s	117.5 CH	6.87 s
7	129.9 C		129.9 C
8	104.6 CH	6.45 s	104.9 CH	6.45 s
9	152.4 C		152.2 C
10	19.1 CH3	2.28 s	19.9 CH3	2.27 s
11	26.8 CH2	3.07 t (7.6)	28.8 CH2	3.05 t (7.6)
12	33.2 CH2	2.71 t (7.6)	33.8 CH2	2.72 t (7.6)
13	173.9 C		173.1 C
13-OMe			52.4 CH3	3.66 s