methyl 5-((2R,3R,4S)-4-(benzyl(chlorocarbonyl)amino)-3-bromotetrahydrothiophen-2-yl)pentanoate

Δ2,3,N-(Phenylmethyl)-2-(carbomethoxybutyl)dihydrothiophene-4(S)-carbamoyl azide

N-(Phenylmethyl)-3(R)-bromo-2(R)-(carbomethoxybutyl)tetrahydrothiophene-4(S)-carbamoyl azide

hex-5-ynoyl chloride

(1R,7R,8R,11S)-11-Benzylamino-7-hydroxy-9-thia-2-aza-bicyclo[6.2.1]undecan-3-one