4,5-dimethoxy-2-methyltricyclo[6.2.1.02,7]undeca-4,9-diene-3,6-dione

5,6,7,8-tetrafluoro-1,4-dihydro-1,4-methanonaphthalene

anti-tricyclo(4.3.1.1[2,5])undec-3-en-10-one

((1S,4R)-7,7-dimethyl-2-phenylbicyclo[2.2.1]hept-2-en-1-yl)((3aS,4S,7R,7aS)-2,2-dimethyltetrahydro-6H-4,7-methano[1,3]dioxolo[4,5-d][1,2]oxazin-6-yl)methanone

(1S,4R,5S,6R)-2,3-oxazabicyclo[2.2.1]heptane-5,6-dioxy-isopropylidene