(S)-2-(4-{2-[1-(tert-butoxycarbonyl)aminoethyl]-5-methyloxazolyl})-6-methylpyridine-3-carboxylic acid

(S)-2-(4-{2-[1-(tert-butoxycarbonyl)aminoethyl]-5-methyloxazolyl})-6-methylpyridine-3-carboxamide

(S)-ethyl 2-(4-{2-[1-(tert-butoxycarbonyl)aminoethyl]-5-methyloxazolyl})-6-methylpyridine-3-carboxylate

(S)-2-(4-{2-[1-(tert-butoxycarbonyl)aminoethyl]-5-methyloxazolyl})-6-methylpyridine-3-thiocarboxamide

2-({(S)-2-[(2-{6-Benzyloxymethyl-2-[2-((S)-1-tert-butoxycarbonylamino-ethyl)-5-methyl-oxazol-4-yl]-pyridin-3-yl}-thiazole-4-carbonyl)-amino]-3-methyl-butyrylamino}-methyl)-5-methyl-oxazole-4-carboxylic acid methyl ester