(2S,4S)-2,4-Bis-tert-butoxycarbonylamino-5-hydroxy-2-methyl-pentanoic acid methyl ester

(1R,3S)-3-amino-1,3-diphenylpropan-1-ol

(4S,6S)-6-(tert-Butyl-diphenyl-silanyloxymethyl)-6-methyl-5,6-dihydro-4H-pyrimidine-1,4-dicarboxylic acid 1-tert-butyl ester 4-ethyl ester

(2R,4R)-5-(tert-Butyl-diphenyl-silanyloxy)-4-methyl-2-sulfamoyloxy-pentanoic acid ethyl ester

(4S,6S)-isopropyl 6-((tert-butyldiphenylsilyloxy)methyl)-6-methyl-1-(thiophene-2-carbonyl)-1,4,5,6-tetrahydropyrimidine-4-carboxylate