N,N'-dimethyl-N,N'-diphenylhexa-2,4-diyne-1,6-diamine

ethyl 4-(N-phenyl-N-methylamino)-2-butynoate

ethyl 3-(cyclohexen-1-yl)prop-2-enoate

ethyl 2-cyclohex-1-enylprop-2-enoate

ethyl 2-benzoyl-3,3-dimethylbutanoate