C([CH:3]1[CH2:6][CH:5]([C:7]([OH:9])=[O:8])[CH2:4]1)C.CI.[CH:12]1(C(O)=O)[CH2:15][CH2:14][CH2:13]1.ICCCC>>[CH2:15]([C:5]1([C:7]([OH:9])=[O:8])[CH2:4][CH2:3][CH2:6]1)[CH2:12][CH2:13][CH3:14]The title compound was prepared as in Example 2A by replacing 3-ethylcyclobutanecarboxylic acid and methyl iodide respectively with cyclobutanecarboxylic acid and 1-iodobutane (Aldrich Chemical Company; Beilstein 1: 123). The resultant product had the following physical characterisics:
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