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

7,9-bis(p-methoxybenzyl)-7,9-diaza-6-hydroxy-5-vinylbicyclo<4.3.1>decane-8,10-dione