[C:1]([OH:10])(=[O:9])[CH2:2][CH2:3][CH2:4][CH2:5][C:6]([OH:8])=[O:7].[CH2:11](OC(=O)CCCC(OCCC)=O)[CH2:12]C>>[CH2:11]([O:7][C:6](=[O:8])[CH2:5][CH2:4][CH2:3][CH2:2][C:1]([OH:10])=[O:9])[CH3:12]Hexane dioic acid monoethyl ester was prepared from hexane dioic acid through steps (a) and (b) discussed above in example 1, step 2 for the preparation of (III).
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