2-(1-tert-butoxycarbonylamino-ethyl)-6-{4-[1-tert-butoxycarbonyl-2-(tert-butyl-dimethyl-silanyloxy)-ethylthiocarbamoyl]-thiazol-2-yl}-nicotinic acid benzyl ester
2-(1-tert-butoxycarbonylamino-ethyl)-6-{4-[1-tert-butoxycarbonyl-2-(tert-butyl-dimethyl-silanyloxy)-ethylcarbamoyl]-thiazol-2-yl}-nicotinic acid benzyl ester
phenacyl (RS)-2-[2-(1-t-butoxycarbonylaminoethyl)-3-(t-butyldiphenylsiloxymethyl)pyridin-6-yl]-1,3-thiazole-4-carboxylate
2-(1-tert-butoxycarbonylamino-ethyl)-6-[4-(1-tert-butoxycarbonyl-2-hydroxy-ethylthiocarbamoyl)-thiazol-2-yl]-nicotinic acid benzyl ester
2-(1-tert-butoxycarbonylamino-ethyl)-6-[4-(1-tert-butoxycarbonyl-2-hydroxy-ethylthiocarbamoyl)-thiazol-2-yl]-nicotinic acid benzyl ester