3-[3-methyl-5-(3-oxopropyl)-1,2-oxazol-4-yl]propanal

ethyl 5-[5-(5-ethoxy-5-oxopent-3-enyl)-3-methyl-1,2-oxazol-4-yl]pent-2-enoate

diethyl 6-(1-aminoethylidene)-7-oxododecanedioate

9-(4-methylphenyl)-9-azabicyclo[4.2.1]nonane

9-p-Tolyl-9-aza-bicyclo[3.3.1]nonane