(10R*,11R*)-4-Methyl-10,11-bis<(methylsulfonyloxy)-methyl>-2,4,6-triazatricyclo<5.2.2.02,6>undec-8-en-3,5-dion

(10R*,11R*)-10,11-Bis<(methylsulfonyloxy)methyl>-4-phenyl-2,4,6-triazatricyclo<5.2.2.02,6>undec-8-en-3,5-dion

r-1-Acetamido-c-4-acetoxy-2-cyclohexen-t-5,t-6-dicarbonsaeure-diethylester

r-1-Acetamido-t-2,t-3,c-4-triacetoxycyclohexan-t-5,t-6-dicarbonsaeure-diethylester