259-49-4

 Benzo[3'',4'']cyclobuta[1'',2'':3',4']cyclobuta[1',2':3,4]cyclobuta[1,2]benzene,hexadecahydro-

C₁₆H₂₄

259-58-5

 Cyclobut[b]anthracene

C₁₆H₁₀

259-63-2

 Benzo[1,2:4,5]dicycloheptene

C₁₆H₁₂

259-72-3

 3H-5,17-Hexano-4,8-metheno-1H-2-benzoxacyclohexadecin,9,10,11,12,13,14-hexahydro- (8CI,9CI)

C₂₆H₃₄O

259-73-4

 2,13-Hexanodibenz[c,k]oxacyclotridecin,5,6,7,8,9,10,15,17-octahydro-

C₂₆H₃₄O

259-77-8

 pentacyclo[6.4.0.0~2,7~.0~4,11~.0~5,10~]dodecane

C₁₂H₁₆

259-78-9

 3,9-Dioxapentacyclo[6.4.0.02,7.04,11.05,10]dodecane(8CI,9CI)

C₁₀H₁₂O₂

259-79-0

 biphenylene

C₁₂H₈

259-84-7

 cyclobuta[1,2-b:4,3-b']dipyridine

C₁₀H₆N₂

259-96-1

 3,9,12-Trioxapentacyclo[6.5.0.02,7.04,11.05,10]tridecane(8CI,9CI)

C₁₀H₁₂O₃

260-21-9

 5H-Dibenzo[c,h][1,2,5,7,6]dithiadiazaphosphonine

C₁₂H₉N₂PS₂

260-23-1

 Acridarsine (8CI,9CI)

C₁₃H₉As

260-25-3

 phenoxarsine

260-27-5

 Dibenzo[b,e][1,4]phospharsenin(8CI,9CI)

C₁₂H₈AsP