(5aRS,6SR,13aRS,14SR)-tetrahydro-5,14-epoxy-2,3-bis(trimethylsilyl)pentacene-6,13-dione

(5RS,5aSR,6aSR,7SR,12RS,12aRS,13aRS,14SR)-octahydro-[5,14][7,12]-diepoxy-2,3,9,10-tetrakis(trimethylsilyl)pentacene-6,13-dione

7,8-dicyano-1,4-epoxy-2,3-bis(trimethylsilyl)-1,4-dihydroanthracene

2,3-dicyano-6,7-bis(trimethylsilyl)naphthalene

(5aRS,6SR,11RS,11aSR)-tetrahydro-6,11-epoxy-8,9-bis(trimethylsilyl)tetracene-5,12-dione