4-(p-tert.-Butyl-phenyl)-3-hydroxy-buttersaeurenitril

3-(2-Nitrobenzoyloxy)benzaldehydcyanhydrin

Cyclohexaneacetic acid, 1-carboxy-4,4-diethyl-

7-ethyloxycarbonyl-6-cyano-8-oxo-2-phenyl-1-aza-3-oxa-bicyclo[3.3.0]octane

[1-(4-Fluoro-phenyl)-4-(4-nitro-phenyl)-1H-pyrazol-3-yl]-acetonitrile