Table 3.

¹³C-NMR data of compounds 1–5 in CDCl₃ (600 MHz; TMS as internal standard).

C	1	2	3b (*)	4	5
	δ	δ	δ	δ	δ
1	44.9 d	44.2 d	42.5 d	44.3 d	44.2 d
2	33.0 t	32.7 t	28.5 t	32.8 t	32.6 t
3	63.2 d	63.1 d	62.8 d	63.2 d	63.0 d
4	65.8 s	66.0 s	65.7 s	66.1 s	65.8 s
5	50.8 d	50.4 d	50.3 d	50.3 d	50.2 d
6	80.5 d	80.8 d	79.9 d	80.8 d	81.1 d
7	44.1 d	50.0 d	47.3 d	44.7 d	47.5 d
8	29.2 t	30.9 t	24.2 t	31.2 t	31.0 t
9	28.6 t	31.0 t	24.2 t	30.9 t	30.4 t
10	146.1 s	147.3 s	57.1 s	147.2 s	146.3 s
11	139.6 s	41.9 d	139.2 s	47.9 d	43.6 d
12	169.7 s	178.4 s	169.5 s	175.8 s	174.1 s
13	120.2 t	13.2 q	120.2 t	69.2 t	17.1 t
14	115.3 t	114.1 t	53.1 t	114.2 t	114.9 t
15	18.5 q	18.7 q	19.0 q	18.7 q	18.6 q
Others	---	---	---	53.9 (q; OMe)	116.7 (s; CN)

(*): 125 MHz.