Sample Infra-red stretching (n=cm-1) Methyl-pioglitazone 2945 (Aliphatic CH), 2889 (Aliphatic CH), 1705 (Carbonyl group), 1465 (Ether group), 1248 (C-C bond) β-CD 3296 (O-H), 2910 (Aliphatic CH), 1142 (C-C bond), 1035 (C-O-C) Methyl-pioglitazone-β-CD 3205 (O-H), 2942 (Aliphatic C-H), 1715 (Carbonyl group), 1462 (Ether group), 1240 (C-C bond), 1098 (C-O-C)

Table 1: Peaks in FTIR spectra of methyl-pioglitazone, β-CD, and methylpioglitazone–β-CD inclusion complex.