(3S,2'S)-tert-butyl 3-(2-amino-3-methylbutanoyloxy)pent-4-enoate

(R)-2'-(((S)-3-((L-valyl)oxy)pent-4-enamido)methyl)-4-methyl-4,5-dihydro-[2,4'-bithiazole]-4-carboxylic acid

methyl (R)-2'-(aminomethyl)-4-methyl-4,5-dihydro-[2,4'-bithiazole]-4-carboxylate 2,2,2-trifluoroacetate

(R)-methyl-2-(2-((tert-butoxycarbanylamino)methyl)thiazol-4-yl)-4-methyl-4,5-dihydrothiazole-4-carboxylate

(R)-2-(2-((tert-butoxycarbonylamino)methyl)thiazol-4-yl)-4-methyl-4,5-dihydrothiazole-4-carboxylic acid