((1S,5R,7R)-10,10-Dimethyl-3,3-dioxo-3λ6-thia-4-aza-tricyclo[5.2.1.01,5]dec-4-yl)-oxo-acetaldehyde O-benzyl-oxime

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

(S)-1-Benzyloxy-5-((1S,5R,7R)-10,10-dimethyl-3,3-dioxo-3λ6-thia-4-aza-tricyclo[5.2.1.01,5]decane-4-carbonyl)-3-methylene-pyrrolidin-2-one