(+/-)-1-ethyl-2-cyclohexene-1-propanamine

(+/-)-4-[2-(acetyloxy)ethyl]-4-ethyl-2-iodo-2-cyclohexen-1-one

(+/-)-8-ethyl-6-(2-nitrophenyl)-1,4-dioxaspiro[4.5]dec-6-ene-8-ethanal

(+/-)-4-[2-(acetyloxy)ethyl]-4-ethyl-2-(2-nitrophenyl)-2-cyclohexen-1-one

{3-[1-ethyl-3-(2-nitro-phenyl)-4-oxo-cyclohex-2-enyl]-propyl}-carbamic acid tert-butyl ester