C(OC(=O)C)(=O)C.[C:8]([OH:15])(=[O:14])[CH2:9][CH2:10][CH2:11][CH2:12][CH3:13]>>[C:8]([O-:15])(=[O:14])[CH2:9][CH2:10][CH3:11].[C:8]([O-:15])(=[O:14])[CH2:9][CH2:10][CH2:11][CH3:12].[C:8]([O-:15])(=[O:14])[CH2:9][CH2:10][CH2:11][CH2:12][CH3:13]A, but substituting for acetic anhydride, the anhydrides or halides of propionic, butanoic, pentanoic, or hexanoic acid, the corresponding manoalide delta-lactone propionate, butanoate, pentanoate, and hexanoate are prepared.
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