Influence of Hydroxypropyl-𝜷-Cyclodextrin on the Photostability of Fungicide Pyrimethanil

Table 1

¹H NMR chemical shift (δ) data of pyrimethanil, HP-β-CD, and pyrimethanil/HP-β-CD inclusion complex.

H assignment	δ pyrimethanil; (CH3OD)	δ HP-β-CD; (CH3OD)	δ pyrimethanil/HP-β-CD; (CH3OD)	Δδ
2 × (CH3)	2.315 (s)	—	2.338	0.023
H5	6.538 (s)	—	6.581	0.043
H4′	6.954 (m)	—	6.967	0.013
H3′/H5′	7.257 (dd)	—	7.271	0.014
H2′/H6′	7.669 (dd)	—	7.671	0.002
H1′′	—	5.048 (m)	5.046	−0.002
H3′′	—	3.967 (s)	3.950	−0.017
H6′′	—	3.831 (s)	3.828	−0.003
H5′′	—	3.727 (s)	3.731	0.004
H2′′	—	3.528 (m)	3.529	0.001
H4′′	—	3.413 (m)	3.417	0.004