(2R,3R)-3-benzoylamino-2-ethylhexanoic acid tert-butyl ester

(5S,6R)-2-(3'-benzyloxy)propyl-3-acetyl-5-ethyl-6-propyl-1,4,5,6-tetrahydropyridine

(3R)-3-benzoylaminohexanoic acid tert-butyl ester

tert-butyl hex-2-enoate

tert-butyl (3R)-3-aminohexanoate