Cross-polarization kinetic parameters: T_CP and T_1ρ for dihydrocapsaicin, capsaicin⁵ and nonivamide (nd – no data from cited publication).

Parameter	DHCAP		CAP5		NVA
	Mean value ± SD [ms]	Range of values [ms]	Mean value ± SD [ms]	Range of values [ms]	Mean value ± SD [ms]	Range of values [ms]
Quaternary carbons C1′, C3′, C4′
T CP	0.87 ± 0.24	0.65–1.13	0.95 ± 0.22	0.71–1.23	0.71 ± 0.08	0.64–0.80
T H	159 ± 15	143–172	154 ± 35	124–192	31 ± 8	24–40
T df	0.95 ± 0.43	0.58–1.42	Nd	nd	0.87 ± 0.38	0.59–1.43
C1 O
T CP	0.69	—	0.67	—	1.14	—
T H	122	—	107	—	35	—
T df (I-I*-S)	0.61	—	Nd	nd	0.52	—
C–H aromatic (C2′, C5′, C6′) and C8 in DHCAP
T CP	0.51 ± 0.09	0.45–0.65	0.42 ± 0.05	0.35–0.47	0.42 ± 0.08	0.33–0.49
T H	200 ± 58	150–250	149 ± 20	117–160	39 ± 7	35–48
T df (I-I*-S)	0.42 ± 0.11	0.30–0.53	Nd	nd	0.29 ± 0.03	0.23–0.30
CH 2 (C2–C7) i C7′
T CP	0.38 ± 0.11	0.30–0.60	0.27 ± 0.12	0.2–0.47	0.20 ± 0.06	0.15–0.3
T H	148 ± 23	128–180	129 ± 15	115–148	23 ± 4	21–33
T df (I-I*-S)	0.35 ± 0.11	0.20–0.50	Nd	nd	0.10 ± 0.09	0.05–0.31
CH 3 groups
T CP	1.62 ± 0.05	1.58–1.65	0.85 ± 0	—	0.32	—
T H	160 ± 14	150–170	160 ± 14	150–170	31	—
T df (I-I*-S)	2.00 ± 0.00	2.00	Nd	nd	0.23	—
OCH 3 groups
T CP	0.68	—	0.45	—	0.50	—
T H	180	—	180	—	35	—
T df (I-I*-S)	0.30	—	Nd	nd	0.32 ± 0.01	0.31–0.33