272-53-7

7H-Pyrazolo[4,3-d]pyrimidine

C₅H₄N₄

272-54-8

5H-Pyrazolo[4,3-d]pyrimidine

C₅H₄N₄

272-55-9

2H-Pyrazolo[4,3-d]pyrimidine

C₅H₄N₄

272-56-0

3H-Pyrazolo[4,3-d]pyrimidine

C₅H₄N₄

272-57-1

1H-Pyrazolo[4,3-d]pyrimidine

C₅H₄N₄

272-58-2

Isoxazolo[4,3-d]pyrimidine(8CI,9CI)

C₅H₃N₃O

272-60-6

1H-pyrazolo[3,4-b]pyrazine

272-62-8

Furo[3,2-b]pyridine

C₇H₅NO

272-67-3

thieno[3,2-b]pyridine

C₇H₅NS

272-68-4

thieno[3,2-d]pyrimidine

C₆H₄N₂S

272-81-1

5H-Thieno[3,2-b]pyran

C₇H₆OS

272-90-2

Mercury, m-oxo-m-1,2-phenylenedi- (9CI)

C₆H₄Hg₂O

272-94-6

2H-Benzimidazole

C₇H₆N₂

272-97-9

5-Azabenzimidazole

C₆H₅N₃

273-00-7

1H-Imidazo[4,5-d]pyridazine

C₅H₄N₄

273-02-9

2H-Benzotriazole

C₆H₅N₃

273-05-2

2H-[1,2,3]triazolo[4,5-c]pyridine

C₅H₄N₄

273-09-6

Benzofurazan

C₆H₄N₂O

273-12-1

1H-1,3,2-Benzodiazaphosphole

C₆H₅N₂P

273-13-2

2,1,3-Benzothiadiazole

C₆H₄N₂S

273-14-3

[1,2,5]Thiadiazolo[3,4-d]pyridazine

C₄H₂N₄S

273-15-4

2,1,3-Benzoselenadiazole

C₆H₄N₂Se

273-21-2

4-Azabenzimidazole

C₆H₅N₃

273-24-5

5H-Purine

C₅H₄N₄

273-27-8

6H-Purine

C₅H₄N₄

273-28-9

8H-Purine

C₅H₄N₄

273-34-7

1H-1,2,3-triazolo(4,5-B)pyridine

C₅H₄N₄

273-37-0

7H-1,2,3-Triazolo[4,5-d]pyrimidine

C₄H₃N₅

273-38-1

5H-1,2,3-Triazolo[4,5-d]pyrimidine

C₄H₃N₅

273-39-2

2H-1,2,3-Triazolo[4,5-d]pyrimidine

C₄H₃N₅

273-40-5

2H-[1,2,3]triazolo[4,5-d]pyrimidine

C₄H₃N₅

273-46-1

7aH-[1,3,2]diazaphospholo[4,5-d]pyrimidine

C₄H₃N₄P

273-47-2

[1,2,5]Thiadiazolo[3,4-d]pyrimidine(8CI,9CI)

C₄H₂N₄S

273-48-3

[1,2,5]Selenadiazolo[3,4-d]pyrimidine(7CI,8CI,9CI)

C₄H₂N₄Se

273-53-0

Benzoxazole

C₇H₅NO

273-56-3

Oxazolo[4,5-c]pyridine

C₆H₄N₂O

273-59-6

1,2,3-benzoxadiazole

C₆H₄N₂O

273-64-3

Oxazolo[5,4-d]pyrimidine(8CI,9CI)

C₅H₃N₃O

273-66-5

[1,2,3]Oxadiazolo[5,4-d]pyrimidine(8CI,9CI)

C₄H₂N₄O

273-70-1

Thiazolo[4,5-c]pyridine

C₆H₄N₂S

273-75-6

Thiazolo[4,5-c]pyridine

C₆H₄N₂S

273-76-7

Thiazolo[4,5-d]pyridazine

C₅H₃N₃S

273-77-8

1,2,3-benzothiadiazole

C₆H₄N₂S

273-81-4

1,2,3-Benzodithiazol-1-ium

C₆H₄NS₂

273-83-6

1,2,3-Benzodithiazol-2-ium(8CI,9CI)

C₆H₄NS₂

273-86-9

Thiazolo[5,4-d]pyrimidine

C₅H₃N₃S

273-88-1

[1,2,3]Thiadiazolo[5,4-d]pyrimidine(8CI,9CI)

C₄H₂N₄S

273-91-6

1,3-benzoselenazole

C₇H₅NSe

273-92-7

1,2,3-benzoselenadiazole

C₆H₄N₂Se

273-94-9

2H-imidazo[4,5-b]pyrazine

C₅H₄N₄

273-95-0

2H-1,2,3-Triazolo[4,5-b]pyrazine

C₄H₃N₅

273-98-3

Thiazolo[4,5-b]pyridine

C₆H₄N₂S

273-99-4

Thiazolo[4,5-d]pyrimidine

C₅H₃N₃S

274-00-0

Thiazolo[4,5-b]pyrazine

C₅H₃N₃S

274-04-4

Aluminum,[1,2-benzenediolato(2-)-kO,kO']hydro- (9CI)

C₆H₅AlO₂

274-07-7

1,3,2-benzodioxaborole

C₆H₅BO₂

274-09-9

1,3-Benzodioxole

C₇H₆O₂

274-15-7

1,3,2-Benzodioxaphosphole

C₆H₅O₂P

274-19-1

1,3,2-Benzodioxastibole(8CI,9CI)

C₆H₅O₂Sb

274-23-7

1,3-Dioxolopyrimidine(8CI,9CI)

C₅H₄N₂O₂

274-26-0

1,3-Benzoxathiole

C₇H₆OS

274-29-3

1,3,2-Benzodithiaborole

C₆H₅BS₂

274-30-6

1,3-Benzodithiole

C₇H₆S₂

274-31-7

1,3-Benzodithiol-1-ium

C₇H₅S₂

274-40-8

indolizine

C₈H₇N

274-43-1

Pyrrolo[1,2-c]pyrimidine

C₇H₆N₂

274-45-3

pyrrolo[1,2-a]pyrazine

C₇H₆N₂

274-47-5

imidazo[1,5-a]pyridine

C₇H₆N₂

274-49-7

imidazo[1,5-a]pyrazine

C₆H₅N₃

274-55-5

Pyrrolo[1,2-b]pyridazine

C₇H₆N₂

274-56-6

Pyrazolo[1,5-a]pyridine

C₇H₆N₂

274-59-9

[1,2,3]triazolo[1,5-a]pyridine

C₆H₅N₃

274-66-8

Pyrrolo[1,2-a]pyrimidine

C₇H₆N₂

274-67-9

Imidazo[1,5-a]pyrimidine

C₆H₅N₃

274-68-0

Imidazo[1,5-a]-1,3,5-triazine(9CI)

C₅H₄N₄

274-71-5

pyrazolo[1,5-a]pyrimidine

C₆H₅N₃

274-72-6

Pyrazolo[1,5-a]-1,3,5-triazine

C₅H₄N₄

274-76-0

imidazo(1,2-A)pyridine

C₇H₆N₂

274-77-1

1H-Imidazo[1,2-a]pyridin-4-ium

C₇H₇N₂

274-78-2

Imidazo[1,2-c]pyrimidine

C₆H₅N₃

274-79-3

imidazo[1,2-a]pyrazine

C₆H₅N₃

274-80-6

[1,2,4]triazolo[4,3-a]pyridine

C₆H₅N₃

274-81-7

[1,2,4]triazolo[4,3-c]pyrimidine

C₅H₄N₄

274-82-8

[1,2,4]triazolo[4,3-a]pyrazine

C₅H₄N₄

274-83-9

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

C₅H₄N₄

274-85-1

[1,2,4]Triazolo[1,5-a]pyridine

C₆H₅N₃

274-86-2

[1,2,4]Triazolo[1,5-c]pyrimidine

C₅H₄N₄

274-87-3

tetrazolo[1,5-a]pyridine

C₅H₄N₄

274-88-4

Tetrazolo[1,5-c]pyrimidine

C₄H₃N₅

274-89-5

Tetrazolo[1,5-b]pyridazine

C₄H₃N₅

274-95-3

Imidazo[1,2-a]pyrimidine

C₆H₅N₃

274-98-6

[1,2,4]triazolo[4,3-a]pyrimidine

C₅H₄N₄

274-99-7

1,2,4-Triazolo[4,3-a][1,3,5]triazine

C₄H₃N₅

275-00-3

Imidazo[1,2-b][1,2,4]triazine

C₅H₄N₄

275-01-4

1,2,4-Triazolo[4,3-b][1,2,4]triazine(9CI)

C₄H₃N₅

275-02-5

1,2,4-triazolo(1,5-A)pyrimidine

C₅H₄N₄

275-03-6

tetrazolo[1,5-a]pyrimidine

C₄H₃N₅

275-13-8

Oxazolo[3,2-a]pyridinium

C₇H₆NO

275-20-7

Thiazolo[3,2-a]pyridinium

C₇H₆NS

275-21-8

5H-Thiazolo[3,2-c]pyrimidine

C₆H₆N₂S