5,6-diacetyl-hexamethyl-bicyclo[2.2.0]hex-2-ene

1,4,4a,5,8,8a-hexamethyl-tetrahydro-1,4,5,8-diepioxido-[1,2]dioxino[4,5-d][1,2]dioxine

1,2,3,4,5,6,7,10-Octamethyl-8,9-diaza-anti-tricyclo[4.4.0.02,5]deca-3,9-dien-7-carbonitril

3,4-dimethyl-2,5-hexanedione

1,2,3,4,5,6,7,10-octamethyl-8,9-diaza-tricyclo[4.4.0.02,5]deca-3,7,9-triene