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(2007/10/02)4-(2-Benzyloxycarbonyl-1-hydroxy-butyl)-benzoic acid methyl ester
4-(4-Chloro-2-ethyl-3-oxo-butyl)-benzoic acid methyl ester
4-(2-Carboxy-butyl)-benzoic acid methyl ester
4-(4-Azido-2-ethyl-3-oxo-butyl)-benzoic acid methyl ester