(3R,4E)-3-(N-tert-butoxycarbonylamino)-5-phenylpent-4-enoic acid

methyl (2E,4E)-5-phenylpenta-2,4-dienoate

methyl (3R,4E,αS)-3-(N-benzyl-N-α-methylbenzylamino)-5-phenylpent-4-enoate

methyl (3S)-3-(N-tert-butoxycarbonylamino)-5-phenylpentanoate

methyl (3S)-3-amino-5-phenylpentanoate