2-[(6-benzyloxycarbonylamino-2-tert-butoxycarbonylamino-hexyl)-tert-butoxycarbonyl-amino]-thiazole-4-carboxylic acid ethyl ester
2-tert-butoxycarbonylamino-5-[hydroxy-(2-methoxy-phenyl)-methyl]-thiazole-4-carboxylic acid ethyl ester
(4-formyl-thiazol-2-yl)-carbamic acid tert-butyl ester
tert-butyl 4-((2-nitrobenzoyloxy)methyl)thiazol-2-ylcarbamate
tert-butyl 4-((4-bromobenzoyloxy)methyl)thiazol-2-ylcarbamate