Table 2.

¹H NMR chemical shifts (^δ/ppm), chemical shifts variation (Δ^δ/ppm) and coupling constants (J/Hz) of clausenidin protons upon complexation with HPβCD.

Proton No.	Free	with HPβCD	Diff. in chem. Shifit	Clausenidin	Complex	J
	δ0	δ	δ − δ0	Hz
H1	1.6	1.62	−0.02	640	648	−8
H2	5.25	5.2	0.05	2100	2080	20
H3	2.3	2.25	0.05	920	900	20
H4	2.3	2.22	0.08	920	888	32
H5	2.17	2.16	0.01	868	864	4
H6	2.17	2.16	0.01	868	864	4
H7	1.45	1.44	0.01	580	576	4
H9	1.8	0.95	0.85	720	380	340
H10	1.98	0.97	1.01	792	388	404
H11	1.12	1.07	0.05	448	428	20
H12	0.94	1.08	−0.14	376	432	−56
H13	5.75	4.79	0.96	2300	1916	384
H14	5.82	4.95	0.87	2328	1980	348
H15	4.67	4.59	−0.08	–	–	–
H16	3.99	3.02	−0.97	355	1650	−1295
H17	1.35	1.22	0.13	2100	810	−1290
H18	2.11	2.41	−0.3	405	577	−172
H19	2.01	2.34	0.33	2010	452	−1558
H20	2.84	2.78	−0.06	540	647	−107
H21	1.71	1.76	0.05	621	1020	−399
H22	2.51	2.59	0.08	712	1002	−290