ethyl 2-(diethoxyphosphoryl)-2-(cyclohept-2'-enyl)acetate

diethyl ((3aR,8R,8aR)-8-iodo-2-oxooctahydro-2H-cyclohepta[b]furan-3-yl)phosphonate

((3aR,8R,8aR)-2-Oxo-8-phenylselanyl-octahydro-cyclohepta[b]furan-3-yl)-phosphonic acid diethyl ester