• 253-66-7
• Cinnolin
• CINNOLINE

• 253-69-0
• 1,7-Naphthyridine(6CI,7CI,8CI,9CI)
• 1,7-Naphthyridine(6CI,7CI,8CI,9CI)

• 253-72-5
• 1,6-NAPHTHYRIDINE
• 1,6-NAPHTHYRIDINE

• 253-73-6
• 3,4,10-triazabicyclo[4.4.0]deca-1,3,5,7,9-pentaene
• 3,4,10-triazabicyclo[4.4.0]deca-1,3,5,7,9-pentaene

• 253-82-7
• Chinazolin
• Quinazoline

• 253-86-1
• Pyrido[3,4-d]pyrimidine (7CI,8CI,9CI)
• Pyrido[3,4-d]pyrimidine (7CI,8CI,9CI)

• 253-87-2
• Pyrido[4,3-d]pyrimidine (7CI,8CI,9CI)
• Pyrido[4,3-d]pyrimidine (7CI,8CI,9CI)

• 253-88-3
• Pyrimido[4,5-d]pyridazine (7CI,8CI,9CI)
• Pyrimido[4,5-d]pyridazine (7CI,8CI,9CI)

• 253-89-4
• 5H-Thiopyrano[4,3-d]pyrimidine (8CI,9CI)
• 5H-Thiopyrano[4,3-d]pyrimidine (8CI,9CI)

• 254-04-6
• 2H-chromene
• 2H-chromene

• 254-18-2
• Benzoxazine
• Benzoxazine

• 254-27-3
• 4H-1,3-Benzodioxin
• 4H-1,3-benzodioxin

• 254-30-8
• 4H-1,3-Dioxino[4,5-c]pyridine(9CI)
• 4H-1,3-Dioxino[4,5-c]pyridine(9CI)

• 254-60-4
• 1,8-Naphthyridine
• 1,8-Naphthyridine

• 254-61-5
• Pyrido[2,3-d]pyrimidine (7CI,8CI,9CI)
• Pyrido[2,3-d]pyrimidine (7CI,8CI,9CI)

• 254-62-6
• Pyrimido[4,5-c]pyridazine (7CI,8CI,9CI)
• Pyrimido[4,5-c]pyridazine (7CI,8CI,9CI)

• 254-64-8
• Pyrimido[4,5-d]pyrimidine (8CI,9CI)
• Pyrimido[4,5-d]pyrimidine (8CI,9CI)

• 254-69-3
• 7H-Pyrano[2,3-d]pyrimidine (8CI,9CI)
• 7H-Pyrano[2,3-d]pyrimidine (8CI,9CI)

• 254-72-8
• 5H-Thiopyrano[2,3-d]pyrimidine (8CI,9CI)
• 5H-Thiopyrano[2,3-d]pyrimidine (8CI,9CI)

• 254-79-5
• 1,5-NAPHTHYRIDINE
• 1,5-NAPHTHYRIDINE

• 254-80-8
• Pyrido[3,2-d]pyrimidine (7CI,8CI,9CI)
• Pyrido[3,2-d]pyrimidine (7CI,8CI,9CI)

• 254-82-0
• Pyrimido[5,4-d]pyrimidine (7CI,8CI,9CI)
• Pyrimido[5,4-d]pyrimidine (7CI,8CI,9CI)

• 254-83-1
• Pyrimido[5,4-d]-1,2,3-triazine (9CI)
• Pyrimido[5,4-d]-1,2,3-triazine (9CI)

• 254-86-4
• Pyrido[3,4-b]pyrazine (6CI,7CI,8CI,9CI)
• Pyrido[3,4-b]pyrazine (6CI,7CI,8CI,9CI)

• 254-99-9
• Pyrimido[5,4-e]-1,2,4-triazine (9CI)
• Pyrimido[5,4-e]-1,2,4-triazine (9CI)

• 255-01-6
• Pyrimido[4,5-e]-1,2,4-triazine (9CI)
• Pyrimido[4,5-e]-1,2,4-triazine (9CI)

• 255-12-9
• 5H-Pyrimido[4,5-b][1,4]oxazine (8CI,9CI)
• 5H-Pyrimido[4,5-b][1,4]oxazine (8CI,9CI)

• 255-13-0
• 7H-Pyrimido[4,5-b][1,4]oxazine (8CI,9CI)
• 7H-Pyrimido[4,5-b][1,4]oxazine (8CI,9CI)

• 255-37-8
• 1,4-Benzodioxin
• 1,4-Benzodioxin

• 255-55-0
• 1,4-DITHIINO[2,3-B]-1,4-DITHIIN, 97
• 1,4-DITHIINO[2,3-B]-1,4-DITHIIN, 97

• 255-85-6
• 4H,6H-Pyrido1,2-c1,3,5oxadiazine
• 4H,6H-Pyrido1,2-c1,3,5oxadiazine

• 256-80-4
• 10H-Dibenzo[a,d]cycloheptene
• 10H-Dibenzo[a,d]cycloheptene

• 256-81-5
• 5H-Dibenzo[a,d]cyclohepten
• 5H-dibenzo[a,d]cycloheptene

• 256-86-0
• 11H-Dibenz[b,e]azepine
• 11H-Dibenz[b,e]azepine

• 256-90-6
• dibenzo(c,f)(1,2)diazepine
• dibenzo(c,f)(1,2)diazepine

• 256-91-7
• 11H-Dibenzo[c,f][1,2]diazepine
• 11H-Dibenzo[c,f][1,2]diazepine

• 256-96-2
• 5H-dibenz[b,f]azepin
• Iminostilbene

• 257-05-6
• Dibenz[b,f]oxepin
• Dibenz[b,f]oxepin

• 257-07-8
• Dibenz-(b,f)-1,4-oxazephine
• Dibenz-(b,f)-1,4-oxazephine

• 257-13-6
• Dibenzo[b,f]thiepin
• Dibenzo[b,f]thiepin

• 257-24-9
• heptalene
• heptalene

• 257-25-0
• GALLIUM ETHOXIDE
• GALLIUM ETHOXIDE

• 257-89-6
• Benz[b]acridine
• Benz[b]acridine

• 257-97-6
• N,N'-(2,3-Naphthalenediyl)-1,2-benzoquinone diimine
• N,N'-(2,3-Naphthalenediyl)-1,2-benzoquinone diimine

• 258-31-1
• Hexacene
• Hexacene

• 258-47-9
• 2,3:6,7-Bis[1,3]butadienobiphenylene
• 2,3:6,7-Bis[1,3]butadienobiphenylene

• 258-76-4
• Dibenzo[b,i]phenazine
• Dibenzo[b,i]phenazine

• 258-78-6
• 13H-Dibenzo[b,i]phenothiazine
• 13H-Dibenzo[b,i]phenothiazine

• 258-91-3
• Benzo[b]naphtho[2,3-f][1,4]diazocine
• Benzo[b]naphtho[2,3-f][1,4]diazocine

• 259-77-8
• Pentacyclo[6,4,0,0] 2,7 [0]4,11,[0]5,10 dodecane
• Pentacyclo[6,4,0,0] 2,7 [0]4,11,[0]5,10 dodecane

• 259-79-0
• BIPHENYLENE
• BIPHENYLENE

• 259-79-0
• Biphenylene
• Biphenylene

• 259-84-7
• 1,8-DIAZABIPHENYLENE
• 1,8-DIAZABIPHENYLENE

• 260-47-9
• 4H-Naphtho2,3-d-1,3,2-dioxathiin
• 4H-Naphtho2,3-d-1,3,2-dioxathiin

• 260-50-4
• Benzo[g]quinoxaline
• Benzo[g]quinoxaline

• 260-62-8
• 4,5-Didehydro-4H-benzo[b]quinolizine-5-ium
• 4,5-Didehydro-4H-benzo[b]quinolizine-5-ium

• 260-75-3
• pyriMido[4,5-g]quinazoline
• pyriMido[4,5-g]quinazoline

• 260-94-6
• Acridin
• Acridine

• 260-94-6
• 2,3-Benzoquinoline
• 2,3-Benzoquinoline

• 261-05-2
• benzo(b)1,5-naphthyridine
• benzo(b)1,5-naphthyridine

• 261-23-4
• Xanthylium
• Xanthylium

• 261-27-8
• 5H-[1]Benzopyrano[2,3-b]pyridine
• 5H-[1]Benzopyrano[2,3-b]pyridine

• 261-31-4
• 10H-Dibenzo[b,e]thiin
• THIOXANTHENE

• 261-42-7
• TELLUROXANTHENE
• TELLUROXANTHENE

• 261-65-4
• 1,3,9,10-Tetraazaanthracene
• 1,3,9,10-Tetraazaanthracene

• 261-96-1
• 10H-pyrido[3,2-b](1,4)benzothiazin
• 10H-pyrido(3,2-b)(1,4)benzothiazine

• 261-99-4
• 1,2-DIAZAPHENOTHIAZINE
• 1,2-DIAZAPHENOTHIAZINE

• 262-05-5
• 10H-phenoselenazine
• 10H-phenoselenazine

• 262-09-9
• BISCHLOROACETYLETHYLINEDIAMINE
• BISCHLOROACETYLETHYLINEDIAMINE

• 262-12-4
• Dibenzo-p-dioxin
• DIBENZO-P-DIOXIN

• 262-16-8
• 1,4-DIOXINO(2,3,B,5,6,B')DIPYRIDINE
• 1,4-DIOXINO(2,3,B,5,6,B')DIPYRIDINE

• 262-20-4
• Phenoxathiin
• PHENOXATHIIN

• 262-22-6
• 9-Oxa-10-selenaanthracene
• 9-Oxa-10-selenaanthracene

• 262-50-0
• 3,4-Methylenedioxy benzylamine
• 3,4-Methylenedioxy benzylamine

• 262-76-0
• Corrinoid
• Corrinoid

• 262-89-3
• PhenylboronicAcidAnhydride(2,4,6-TriphenylBoroxine)
• PhenylboronicAcidAnhydride(2,4,6-TriphenylBoroxine)

• 262-89-5
• Dibenzo[a,e]cyclooctene
• Dibenzo[a,e]cyclooctene

• 262-98-6
• Dibenzo[c,g][1,2]diazocine
• Dibenzo[c,g][1,2]diazocine

• 262-99-7
• phenhomazine
• phenhomazine

• 264-09-5
• BENZOCYCLOHEPTATRIENE
• BENZOCYCLOHEPTATRIENE

• 264-17-5
• 2H-2-Benzazepine
• 2H-2-Benzazepine

• 264-33-5
• Oxepino4,5-cpyridine
• Oxepino4,5-cpyridine

• 264-95-9
• 5H-Cycloheptapyrimidine (8CI,9CI)
• 5H-Cycloheptapyrimidine (8CI,9CI)

• 264-96-0
• 9H-Cycloheptapyrimidine (8CI,9CI)
• 9H-Cycloheptapyrimidine (8CI,9CI)

• 264-98-2
• 6H-Pyrimido[4,5-e][1,4]diazepine (8CI,9CI)
• 6H-Pyrimido[4,5-e][1,4]diazepine (8CI,9CI)

• 265-17-8
• 2H-Pyrimido[4,5-f]-1,2,4,5-tetrazepine (9CI)
• 2H-Pyrimido[4,5-f]-1,2,4,5-tetrazepine (9CI)

• 267-26-5
• 5H-Indeno[5,6-d]isoxazole(9CI)
• 5H-Indeno[5,6-d]isoxazole(9CI)

• 267-36-7
• Benzo[1,2-b:4,5-c]difuran (8CI,9CI)
• Benzo[1,2-b:4,5-c]difuran (8CI,9CI)

• 267-37-8
• Furo[3,4-f]-1,2-benzisoxazole (9CI)
• Furo[3,4-f]-1,2-benzisoxazole (9CI)

• 267-39-0
• 1H-Furo[3,4-f]benzimidazole(8CI,9CI)
• 1H-Furo[3,4-f]benzimidazole(8CI,9CI)

• 267-41-4
• Furo[3,4-f]benzothiazole (8CI,9CI)
• Furo[3,4-f]benzothiazole (8CI,9CI)

• 267-47-0
• 5H-Furo[2,3-f]indole
• 5H-Furo[2,3-f]indole

• 267-48-1
• 5H-1,3-dioxolo[4,5-f]indol
• 5,6-Methylenedioxyindole

• 267-53-8
• 4H,8H-Benzo[1,2-c:5,4-c]diisoxazole(8CI,9CI)
• 4H,8H-Benzo[1,2-c:5,4-c]diisoxazole(8CI,9CI)

• 267-54-9
• [1,3]Dioxolo[4,5-f]-2,1-benzisoxazole(8CI,9CI)
• [1,3]Dioxolo[4,5-f]-2,1-benzisoxazole(8CI,9CI)

• 267-56-1
• Benzo[1,2-b:5,4-b]difuran (8CI,9CI)
• Benzo[1,2-b:5,4-b]difuran (8CI,9CI)

• 267-57-2
• Furo[3,2-f]-1,2-benzisoxazole (8CI,9CI)
• Furo[3,2-f]-1,2-benzisoxazole (8CI,9CI)

• 267-58-3
• Benzo[1,2-b:4,5-b]difuran (8CI,9CI)
• Benzo[1,2-b:4,5-b]difuran (8CI,9CI)

• 267-60-7
• Benzo[1,2-d:5,4-d]diisoxazole (8CI,9CI)
• Benzo[1,2-d:5,4-d]diisoxazole (8CI,9CI)

• 267-61-8
• Benzo[1,2-b:5,4-b']dithiophene
• Benzo[1,2-b:5,4-b']dithiophene