Table 2.

¹³C NMR (100 MHz, CDCl3) data of compounds aknadinine (1), aknadilactam (2), aknadicine (3) (δ in ppm) and authentic aknadinine, aknadilactam and aknadicine

Position	Aknadinine (1)	Authentic aknadinine21–23	Aknadilactam (2)	Authentic aknadilactam21–23	Aknadicine (3)	Authentic aknadicine21–23
1	119.17	119.13	119.45	119.36	119.51	119.48
2	108.66	108.64	109.70	109.66	108.86	108.82
3	145.02	145.01	145.28	145.24	145.01	144.99
4	143.77	143.76	143.94	143.90	143.71	143.69
5	43.29	43.28	41.60	41.52	42.89	42.86
6	194.83	194.82	192.92	192.86	194.39	194.42
7	138.17	138.12	137.24	137.15	136.97	136.92
8	165.13	165.16	160.80	160.76	164.83	164.96
9	23.07	23.05	25.09	25.01	26.63	26.63
10	25.25	25.22	25.14	25.06	24.99	24.96
11	128.80	128.77	127.91	127.83	128.29	128.23
12	128.41	128.41	123.96	123.90	128.29	128.12
13	47.17	47.13	42.77	42.70	45.42	45.36
14	67.87	67.81	67.98	67.90	67.04	66.97
15	33.99	33.96	40.56	40.47	34.55	34.52
16	51.38	51.34	174.49	174.42	42.23	42.21
3-OMe	56.24	56.22	56.29	56.22	56.25	56.22
7-OMe	60.75	60.73	60.72	60.64	60.61	60.61
8-OMe	60.57	60.55	61.01	60.95	61.26	61.25
N-Me	36.38	36.36	28.23	28.16	-	-

21–23, references