Table 1.

¹³C-NMR (125 MHz), ¹H-NMR (500 MHz), HMQC, HMBC and NOESY data of cryptolepinone (8) (DMSO-d₆, δ ppm).

	HMQC		HMBC				NOESY
			2 J (H C)		3 J (HC)		(H↔H)
n°	δC	δH
1	124.99	8.44 (dd, 1H, J = 8.1 and 1.4 Hz)	C-11a		C-11	C-4a	H-2
2	120.04	7.35 (ddt, 1H, J = 8.1; 7.3 and 0.8 Hz)	C-1		C-4	C-11a	H-1/H-3
3	130.71	7.77 (ddt, 1H, J = 8.7; 7.3 and 1.4 Hz)	C-4		C-1	C-4a	H-2/H-4
4	115.13	7.95 (brd, 1H, J = 8.7 Hz)			C-2	C-11a	H-3
4a	139.73	-
5	-	-
5a	129.89	-
6	122.45	8.38 (brd, 1H, J = 8,4 Hz)	C-6a		C-8	C-9a	H-7
6a	115.70	-
7	118.62	7.20 (ddt, 1H, J = 8.4; 7.6 and 1.0 Hz)	C-6	C-8	C-9	C-6a	H-6/H-8
8	126.54	7.47 (ddt, 1H J = 8.3; 7.6 and 1.0 Hz)			C-6	C-9a	H-7/H-9
9	112.36	7.57 (brd, 1H J = 8.3 Hz)			C-6a	C-7	H-8
9a	138.25	-
10 (N-H)	-	11.89 (s, 1H)	C-10a	C-9a
10a	123.03	-
11	166.45	-
11a	122.90	-
N-CH3	35.41	4.36 (s, 3H)			C-4a	C-5a	H-4/H-6