251-89-8

 Imidazo[5,1-b]thiazole

C₅H₄N₂S

251-91-2

 1H-Imidazo[1,2-a]imidazole

C₅H₅N₃

251-97-8

 Imidazo[2,1-b]thiazole

C₅H₄N₂S

251-99-0

 Imidazo[1,2-d]-1,2,4-thiadiazole

C₄H₃N₃S

252-01-7

 Thiazolo[3,2-d]tetrazole

C₃H₂N₄S

252-03-9

 1,2,4-Triazolo[3,4-b][1,3,4]thiadiazole

C₃H₂N₄S

252-09-5

 7lambda~ 4~ -[1،2] dithiolo[1،5-b][1،2]dithiole؛ [1,2] Dithiolo[1،5-b][1،2]dithiole(6CI)؛ [1,2] Dithiolo[1،5-b][1،2]dithiole-7-SIV (7CI،8CI)؛ 1،6،6a-Trithia (6a-SIV) پنتالین؛ 1،6،6aSIV-Trithiapentalene؛ 1،6،6al4-Trithiapentalene؛ 6a-Thiathiophthene؛ Meribicyclo-1،3-epidithiopenta-1،3-diene-5-thial؛ تیوتیوفتن؛

C₅H₄S₃

252-10-8

 1H,5H-Pyrazolo[1,2-a]pyrazole (8CI,9CI)

C₆H₈N₂

252-36-8

 Cyclobuta[1,2-a:4,3-a']diindene(8CI,9CI)

C₁₈H₁₀

252-47-1

 Benzo[a]biphenylene(6CI,7CI,8CI,9CI)

C₁₆H₁₀

252-49-3

 1,4-Methanobiphenylene(8CI,9CI)

C₁₃H₈

252-60-8

 Naphth[1,8-bc]oxete

C₁₀H₆O

252-69-7

 Dibenzo[a,e]cycloocten-5,11-imine(8CI,9CI)

C₁₆H₁₁N

252-72-2

 6H,12H-6,12-epoxydibenzo[b,f][1,5]dioxocine

C₁₄H₁₀O₃