Table 1. NMR Spectroscopic Data for Compounds 1, 3, and 4 in D₂O at 600 MHz (¹H) and 150 MHz (¹³C).

	compound 1			compound 3			compound 4
position	δC, type (mult; J in Hz)	δH (mult; J in Hz)	HMBC	δC, type (mult; J in Hz)	δH (mult; J in Hz)	HMBC	δC, type (mult; J in Hz)	δH (mult; J in Hz)	HMBC
1	27.1, CH2 (d; 133.0)	1.79 (m)	2, P	68.6, CH (d; 148.5)	3.62 (m)	2, P	59.4, CH (d; 136.5)	4.31 (d; 16.0)	2, P, N
2	34.4, CH2	3.26 (m)	1, 3, P	42.4, CH2	a 3.47, b 3.21 (m)	1, 3, P	120.7, CN
3	173.9, qC			174.3, qC
4	21.8, CH3	1.85 (s)	3	22.0, CH3	1.91 (s)	3
P	21.7 (m)			15.5 (m)			7.6 (d; 16.0)
N							–137.9