Cyclobuta(1, 2-a:3, 4-a')diacenaphthylene, 6b, 6c, 12b, 12c-tetrahydro- (6balpha, 6cbeta, 12bbeta, 12calpha)-

Cyclobuta(1, 2-b:4, 3-b')dipyridine

Cyclobuta(1, 2-c:4, 3-c')dipyridine

Cyclobuta(1, 2-d:3, 4-d')bisthiepin, 1, 2, 4, 5, 6, 7, 9, 10-octahydro-1, 1, 5, 5, 6, 6, 10, 10-octamethyl-

Cyclobuta(a)acenaphthylene, 6b, 7, 8, 8a-tetrahydro-

Cyclobuta(a)naphthalene, 1, 2-dihydro-

Cyclobuta(b)naphthalene, 1, 2-dihydro-

Cyclobuta(b)quinoxaline-1, 2-dione, 3, 8-dihydro-3, 8-dimethyl-

Cyclobuta-dithymidine

Cyclobutaarsane, tetrakis(1, 1-dimethylethyl)-

Cyclobutadiene

Cyclobutadienecarboxaldehydeiron tricarbonyl

Cyclobutadienyl methyl ketone iron tricarbonyl

Cyclobutane

Cyclobutane tetracarboxylic acid

Cyclobutane, 1, 1, 2, 2, 3, 4-hexafluoro-3, 4-bis(trifluoromethyl)-

Cyclobutane, 1, 1, 2, 2-tetrafluoro-

Cyclobutane, 1, 1, 2, 2-tetrafluoro-3-(trimethylsilyl)-

Cyclobutane, 1, 1, 2, 2-tetramethyl-3, 4-bis(1-methylethylidene)-

Cyclobutane, 1, 1, 2, 3, 3, 4-hexafluoro-2, 4-bis(trifluoromethyl)-