| 1 | 1152439-74-1 | Sitagliptin Impurity | Sitagliptin Impurity | C17H22F3NO4
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| 2 | 287952-66-3 | 287952-66-3 | tert-Butyl 4-(4-(trifluoromethoxy)phenoxy)piperidine-1-carboxylate | C17H22F3NO4
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| 3 | | 4-(3-Trifluoromethoxy-phenoxy)-piperidine-1-carboxylic acid tert-butyl ester | 4-(3-Trifluoromethoxy-phenoxy)-piperidine-1-carboxylic acid tert-butyl ester | C17H22F3NO4
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| 4 | | 3-(3-Trifluoromethoxy-phenoxymethyl)-pyrrolidine-1-carboxylic acid tert-butyl ester | 3-(3-Trifluoromethoxy-phenoxymethyl)-pyrrolidine-1-carboxylic acid tert-butyl ester | C17H22F3NO4
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