(1S,4R)-3-Oxo-7-aza-bicyclo[2.2.1]heptane-1,7-dicarboxylic acid 7-benzyl ester 1-tert-butyl ester

N-cyclohex-3-en-1-yl-2,2,2-trifluoroacetamide

N-benzyl-N-(cyclohex-3-en-1-yl)-2,2,2-trifluoroacetamide

(1S,4R)-(l)-menthyl 7-tert-butoxycarbonyl-3-oxo-7-azabicyclo[2.2.1]heptane-2-carboxylate

(1R,4R,4'R,5'R)-4',5'-diphenylspiro[7-(tert-butoxycarbonyl)-7-azabicyclo[2.2.1]hept-5-en-2,2'-imidazolidine]