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(2007/10/02)4-[4-(2,6-Diamino-5-nitro-pyrimidin-4-ylamino)-2-ethyl-3-oxo-butyl]-benzoic acid methyl ester
4-[2-(2,4-Diamino-pteridin-6-yl)-butyl]-benzoic acid
4-(2-Benzyloxycarbonyl-1-hydroxy-butyl)-benzoic acid methyl ester
4-(4-Azido-2-ethyl-3-oxo-butyl)-benzoic acid methyl ester
4-(4-Chloro-2-ethyl-3-oxo-butyl)-benzoic acid methyl ester