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. 2023 Jan 22;15(2):382. doi: 10.3390/pharmaceutics15020382

Table 3.

Chemical shifts values δ for 2-hydroxypropyl-β-cyclodextrin (2-HP-β-CD) and for complex of curcumin: 2-hydroxypropyl-β-cyclodextrin (Complex) and changes in chemical shifts Δδ for protons originate from 2-hydroxypropyl-β-cyclodextrin in complex.

Type of Proton Chemical Shifts Values δ Δδ
2-HP-β-CD Complex
CH3 1.1692 1.1678 +0.0014
H-C1 5.1005 5.0993 +0.0012
H-C2 5.2732 5.2743 −0.0011