(S)-2-Amino-1-((1S,5R,7R)-10,10-dimethyl-3,3-dioxo-3λ6-thia-4-aza-tricyclo[5.2.1.01,5]dec-4-yl)-pent-4-en-1-one; hydrochloride

ethyl (RS)-2-(tert-butoxycarbonylamino)pent-4-enoate

Acetamino-allyl-malonsaeure-monoaethylester

N-benzyloxy-L-allylglycine tert-butyl ester

(3S,6S)-bis-(2-propenyl)piperazine-2,5-dione