[C:1]([CH:4]([CH3:16])[CH2:5][CH2:6][CH2:7][CH2:8][CH2:9][C:10]1[C:11](=[O:15])[CH2:12][CH2:13][CH:14]=1)([OH:3])=[O:2].[CH2:17](O)[CH3:18]>>[C:1]([CH:4]([CH3:16])[CH2:5][CH2:6][CH2:7][CH2:8][CH2:9][C:10]1[C:11](=[O:15])[CH2:12][CH2:13][CH:14]=1)([O:3][CH2:17][CH3:18])=[O:2]Esterification with ethanol of the acid chloride derived from 2-(6-carboxyheptyl)-2-cyclopentenone in the manner of Example 31 is productive of the subject compound.
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