(E)-tert-butyl (tert-butoxycarbonylamino)(3-(5-methyl-4-(2-(methylthio)ethyl)oxazol-2-yl)phenylamino)methylenecarbamate

(E)-tert-butyl (tert-butoxycarbonylamino)(4-chloro-3-(5-methyl-4-(2 (methylthio)ethyl)oxazol-2-yl)phenylamino)methylenecarbamate

(2R,3R,4R,5R)-2-(6-benzamido-9H-purin-9-yl)-5-((2S,5S)-2-((2,3-bis(tert-butoxycarbonyl)guanidino)methyl)-6-methoxy-6-oxo-5-(2,2,2-trifluoroacetamido)hexyl)tetrahydrofuran-3,4-diyl diacetate

N-(O-t-butyl-(S)-α-glutamyl)-2(S)-{2-[N-(N,N'-di-t-butoxycarbonylamidino)-4-piperidyloxy]ethyl}piperidine