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

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