8,10-bis(p-methoxybenzyl)-8,10-diaza-6-<(tert-butyldimethylsilyl)oxy>-5-<(phenylselenyl)methyl>-1-methylbicyclo<4.2.2>decane-7,9-dione

8,10-bis(p-methoxybenzyl)-8,10-diaza-6-hydroxy-5-vinylbicyclo<4.2.2>decane-7,9-dione

(1S,6R)-2-Eth-(Z)-ylidene-1-hydroxy-7,9-bis-(4-methoxy-benzyl)-7,9-diaza-bicyclo[4.2.2]decane-8,10-dione

8,10-bis(p-methoxybenzyl)-8,10-diaza-6-hydroxy-1-methyl-5-ethenylbicyclo<4.2.2>decane-7,9-dione

8,10-bis(p-methoxybenzyl)-8,10-diaza-6-<(tert-butyldimethylsilyl)oxy>-5-methylene-1-methylbicyclo<4.2.2>decane-7,9-dione