Ketones

Valerophenon 98 %, ACROS Organics™

CAS: 1009-14-9 Summenformel: C11H14O Molekulargewicht (g/mol): 162.23 MDL-Nummer: MFCD00009480 InChI-Schlüssel: XKGLSKVNOSHTAD-UHFFFAOYSA-N Synonym: valerophenone, butyl phenyl ketone, pentanophenone, 1-phenyl-1-pentanone, 1-pentanone, 1-phenyl, unii-f27q043nt1, n-butyl phenyl ketone, 1-benzoylbutane, valerophenone, 8ci PubChem CID: 66093 ChEBI: CHEBI:36812 IUPAC-Name: 1-Phenylpentan-1-on SMILES: CCCCC(=O)C1=CC=CC=C1

D-Psicose, 98%, ACROS Organics™

CAS: 551-68-8 Summenformel: C6H12O6 Molekulargewicht (g/mol): 180.16 MDL-Nummer: MFCD00083478 InChI-Schlüssel: BJHIKXHVCXFQLS-PUFIMZNGSA-N Synonym: erythrohexulose, 3r,4r,5r-1,3,4,5,6-pentahydroxyhexan-2-one, pseudofructose, unii-qcc18lng3e, d-ribo-hex-2-ulose, qcc18lng3e, dl-psicose, ribo-2-hexulose, d-ribo-2-ketohexose, keto-d-psicose PubChem CID: 90008 ChEBI: CHEBI:27605 IUPAC-Name: (3R,4R,5R)-1,3,4,5,6-Pentahydroxyhexan-2-on SMILES: C(C(C(C(C(=O)CO)O)O)O)O

D(-)-Fructose, AR-zertifiziert zur Analyse, Fisher Chemical

CAS: 57-48-7 Summenformel: C6H12O6 Molekulargewicht (g/mol): 180.156 MDL-Nummer: 148910 InChI-Schlüssel: BJHIKXHVCXFQLS-UYFOZJQFSA-N Synonym: d---fructose, d--fructose, 3s,4r,5r-1,3,4,5,6-pentahydroxyhexan-2-one, furucton, arabino-hexulose, keto-d-fructose, d-levulose, sugar, fruit, fructose, d, krystar 300 PubChem CID: 5984 ChEBI: CHEBI:48095 IUPAC-Name: (3S,4R,5R)-1,3,4,5,6-Pentahydroxyhexan-2-on SMILES: C(C(C(C(C(=O)CO)O)O)O)O

Alfa Aesar™ Acetophenon, 99 %

CAS: 98-86-2 Summenformel: C8H8O Molekulargewicht (g/mol): 120.151 MDL-Nummer: MFCD00008724 InChI-Schlüssel: KWOLFJPFCHCOCG-UHFFFAOYSA-N Synonym: acetophenone, methyl phenyl ketone, acetylbenzene, phenyl methyl ketone, ethanone, 1-phenyl, hypnone, benzoyl methide, acetophenon, 1-phenylethan-1-one, acetylbenzol PubChem CID: 7410 ChEBI: CHEBI:27632 IUPAC-Name: 1-Phenylethanon SMILES: CC(=O)C1=CC=CC=C1

2,3-Dichlor-5,6-Dichyano-1,4-Benzochinon, 98 %, ACROS Organics™

CAS: 84-58-2 Summenformel: C8Cl2N2O2 Molekulargewicht (g/mol): 227.01 InChI-Schlüssel: HZNVUJQVZSTENZ-UHFFFAOYSA-N Synonym: 2,3-dichloro-5,6-dicyano-1,4-benzoquinone, dichlorodicyanoquinone, dichlorodicyanobenzoquinone, dichlorodicyano-p-benzoquinone, 2,3-dichloro-5,6-dicyano-p-benzoquinone, 2,3-dichloro-5,6-dicyanobenzoquinone, 1,4-cyclohexadiene-1,2-dicarbonitrile, 4,5-dichloro-3,6-dioxo, ddq, 2,3-dichloro-5,6-dicyanoquinone, 4,5-dichloro-3,6-dioxo-1,4-cyclohexadiene-1,2-dicarbonitrile PubChem CID: 6775 IUPAC-Name: 4,5-Dichlor-3,6-dioxocyclohexa-1,4-dien-1,2-dicarbonitril SMILES: C(#N)C1=C(C(=O)C(=C(C1=O)Cl)Cl)C#N

1-Brom-3,3-dimethylbutan-2-on, tech., Maybridge

CAS: 5469-26-1 Summenformel: C6H11BrO Molekulargewicht (g/mol): 179.057 MDL-Nummer: MFCD00000206 InChI-Schlüssel: SAIRZMWXVJEBMO-UHFFFAOYSA-N Synonym: 1-bromopinacolone, bromopinacolone, 1-bromo-3,3-dimethyl-2-butanone, 1-bromopinacolin, bromopinacolin, bromomethyl tert-butyl ketone, pivaloylmethyl bromide, tert-butyl bromomethyl ketone, 2-butanone, 1-bromo-3,3-dimethyl, omega-brompinakolin german PubChem CID: 21642 IUPAC-Name: 1-Brom-3,3-Dimethylbutan-2-on SMILES: CC(C)(C)C(=O)CBr

Alfa Aesar™ 2,6-Dichlorindophenol-Natriumsalzhydrat

CAS: 1266615-56-8 Summenformel: C12H6Cl2NNaO2 Molekulargewicht (g/mol): 290.075 MDL-Nummer: MFCD00150014 InChI-Schlüssel: CVSUAFOWIXUYQA-UHFFFAOYSA-M Synonym: 2,6-dichloroindophenol sodium salt, 2,6-dichlorophenolindophenol sodium salt, tillman's reagent, tillman's reagenz, dichlorphenol-indophenolnatrium, 2,6-dichloroindophenol sodium, unii-kad7q8xo1y, sodium 2,6-dichloroindophenol, sodium 2,6-dichloroindophenolate, 2,6-dichloroindophenol, sodium salt PubChem CID: 23697355 ChEBI: CHEBI:948 IUPAC-Name: Natrium;4 -[(3,5-Dichlor-4 -Oxocyclohexa-2,5 -Dien-1-yliden)amino]phenolat SMILES: C1=CC(=CC=C1N=C2C=C(C(=O)C(=C2)Cl)Cl)[O-].[Na+]

Acetophenon, 98 %, Extra Pure, ACROS Organics™

CAS: 98-86-2 Summenformel: C8H8O Molekulargewicht (g/mol): 120.15 MDL-Nummer: MFCD00008724 InChI-Schlüssel: KWOLFJPFCHCOCG-UHFFFAOYSA-N Synonym: acetophenone, methyl phenyl ketone, acetylbenzene, phenyl methyl ketone, ethanone, 1-phenyl, hypnone, benzoyl methide, acetophenon, 1-phenylethan-1-one, acetylbenzol PubChem CID: 7410 ChEBI: CHEBI:27632 IUPAC-Name: 1-Phenylethanon SMILES: CC(=O)C1=CC=CC=C1

D(-)-Fructose, Pure, Fisher Chemical

CAS: 57-48-7 Summenformel: C6H12O6 Molekulargewicht (g/mol): 180.156 MDL-Nummer: 148910 InChI-Schlüssel: BJHIKXHVCXFQLS-UYFOZJQFSA-N Synonym: d---fructose, d--fructose, 3s,4r,5r-1,3,4,5,6-pentahydroxyhexan-2-one, furucton, arabino-hexulose, keto-d-fructose, d-levulose, sugar, fruit, fructose, d, krystar 300 PubChem CID: 5984 ChEBI: CHEBI:48095 IUPAC-Name: (3S,4R,5R)-1,3,4,5,6-Pentahydroxyhexan-2-on SMILES: C(C(C(C(C(=O)CO)O)O)O)O

Tetraphenylcyclopentadienon 99 %, ACROS Organics™

CAS: 479-33-4 Summenformel: C29H20O Molekulargewicht (g/mol): 384.47 MDL-Nummer: MFCD00001407 InChI-Schlüssel: PLGPSDNOLCVGSS-UHFFFAOYSA-N Synonym: tetraphenylcyclopentadienone, tetracyclone, cyclone, tetracyclon, 2,3,4,5-tetraphenylcyclopenta-2,4-dienone, 2,4-cyclopentadien-1-one, 2,3,4,5-tetraphenyl, tetraphenyl-2,4-cyclopentadien-1-one, 2,3,4,5-tetraphenylcyclopentadienone, cyclone compound, 2,3,4,5-tetraphenyl-2,4-cyclopentadienone PubChem CID: 68068 IUPAC-Name: 2,3,4,5-Tetraphenylcyclopenta-2,4-dien-1-on SMILES: C1=CC=C(C=C1)C2=C(C(=O)C(=C2C3=CC=CC=C3)C4=CC=CC=C4)C5=CC=CC=C5

2,6-Dichlorindophenol, Natriumsalz-Hydrat, 98+ %, ACROS Organics™

CAS: 1266615-56-8 Summenformel: C12H10Cl2NNaO4 Molekulargewicht (g/mol): 326.105 InChI-Schlüssel: WZHXLAHEFATELD-UHFFFAOYSA-M Synonym: Tillman's reagent hydrate PubChem CID: 23696612 IUPAC-Name: Natrium;4-[(3,5-Dichlor-4-Oxocyclohexa-2,5-dien-1-Ylidene)Amino]Phenolat SMILES: C1=CC(=CC=C1N=C2C=C(C(=O)C(=C2)Cl)Cl)[O-].O.O.[Na+]

2-Brom-4'-Phenylacetophenon, 98 %, ACROS Organics™

CAS: 135-73-9 Summenformel: C14H11BrO Molekulargewicht (g/mol): 275.13 MDL-Nummer: MFCD00000202 InChI-Schlüssel: KGHGZRVXCKCJGX-UHFFFAOYSA-N Synonym: 2-bromo-4'-phenylacetophenone, 4-phenylphenacyl bromide, p-bromoacetylbiphenyl, p-phenylphenacyl bromide, bromomethyl p-biphenylyl ketone, ethanone, 1-1,1'-biphenyl-4-yl-2-bromo, 2-bromo-1-4-phenylphenyl ethan-1-one, acetophenone, 2-bromo-4'-phenyl, alpha-bromo-p-phenylacetophenone, omega-bromo-4-phenylacetophenone PubChem CID: 67282 IUPAC-Name: 2-Brom-1-(4-Phenylphenyl)ethanon SMILES: C1=CC=C(C=C1)C2=CC=C(C=C2)C(=O)CBr

2-Bromo-4 '-Methylacetophenon, 97 %, ACROS Organics™

CAS: 619-41-0 Summenformel: C9H9BrO Molekulargewicht (g/mol): 213.07 MDL-Nummer: MFCD00000203 InChI-Schlüssel: KRVGXFREOJHJAX-UHFFFAOYSA-N Synonym: 2-bromo-4'-methylacetophenone, 2-bromo-1-p-tolyl ethanone, 4-methylphenacyl bromide, 2-bromo-1-4-methylphenyl ethanone, 2-bromo-1-p-tolylethanone, 2-bromo-4-methylacetophenone, 2-bromo-1-4-methylphenyl ethan-1-one, acetophenone, 2-bromo-4'-methyl, ethanone, 2-bromo-1-4-methylphenyl, p-methylphenacyl bromide PubChem CID: 69272 IUPAC-Name: 2-Brom-1-(4-Methylphenyl)ethanon SMILES: CC1=CC=C(C=C1)C(=O)CBr

5-Bromoisatin, 98 %, ACROS Organics™

CAS: 87-48-9 Summenformel: C8H4BrNO2 Molekulargewicht (g/mol): 226.03 MDL-Nummer: MFCD00005719 InChI-Schlüssel: MBVCESWADCIXJN-UHFFFAOYSA-N Synonym: 5-bromoisatin, 5-bromoindoline-2,3-dione, 5-bromoindole-2,3-dione, isatin, 5-bromo, 5-bromisatin, 1h-indole-2,3-dione, 5-bromo, 5-bromisatin czech, 5-bromo-2,3-dihydro-1h-indole-2,3-dione, indole-2,3-dione, 5-bromo, 5-bromoisatin monohydrate PubChem CID: 6889 IUPAC-Name: 5-Brom-1H-Indol-2,3-Dion SMILES: C1=CC2=C(C=C1Br)C(=O)C(=O)N2

Colchicin, 97 %, ACROS Organics™

CAS: 64-86-8 Summenformel: C22H25NO6 Molekulargewicht (g/mol): 399.44 MDL-Nummer: MFCD00078484 InChI-Schlüssel: IAKHMKGGTNLKSZ-BLYUGYDFSA-N Synonym: colchicine, colchicina, colchicin, condylon, colchicinum, colchisol, colsaloid, colcin, colchineos, 7alphah-colchicine PubChem CID: 45038708 IUPAC-Name: 2,2,2-Trideuterio-N-[(7S)-1,2,3-trimethoxy-9-oxo-10-(trideuteriomethoxy)-6,7-dihydro-5H-benzo[a]heptalen-7-yl]acetamid SMILES: CC(=O)NC1CCC2=CC(=C(C(=C2C3=CC=C(C(=O)C=C13)OC)OC)OC)OC

Alfa Aesar™ 2-Brom-4'-methylpropiophenon, 98 %

CAS: 1451-82-7 Summenformel: C10H11BrO Molekulargewicht (g/mol): 227.101 MDL-Nummer: MFCD11131402 InChI-Schlüssel: OZLUPIIIHOOPNQ-UHFFFAOYSA-N Synonym: 2-bromo-1-p-tolyl propan-1-one, 2-bromo-4'-methylpropiophenone, 2-bromo-1-4-methylphenyl propan-1-one, 2-bromo-4-methylpropiophenone, 2-bromo-1-4-methylphenyl-1-propanone, 1-propanone, 2-bromo-1-4-methylphenyl, 2-bromo-1-p-tolylpropan-1-one, ksc917e0p, 2-bromo-1-p-tolyl-propan-1-one, 4'-methyl-alpha-bromopropiophenone PubChem CID: 2734063 IUPAC-Name: 2-Brom-1-(4-Methylphenyl)propan-1-on SMILES: CC1=CC=C(C=C1)C(=O)C(C)Br

1-Indanon, 99 +%, ACROS Organics™

CAS: 83-33-0 Summenformel: C9H8O Molekulargewicht (g/mol): 132.16 InChI-Schlüssel: QNXSIUBBGPHDDE-UHFFFAOYSA-N Synonym: 1-indanone, indan-1-one, 2,3-dihydro-1h-inden-1-one, indanone, alpha-indanone, alpha-hydrindone, 1h-inden-1-one, 2,3-dihydro, 1-indone, hydrindone, .alpha.-indanone PubChem CID: 6735 ChEBI: CHEBI:17404 IUPAC-Name: 2,3-Dihydroinden-1-on SMILES: C1CC(=O)C2=CC=CC=C21

2-Methyl-2-Cyclopenten-1-on, 97 %, ACROS Organics™

CAS: 1120-73-6 Summenformel: C6H8O Molekulargewicht (g/mol): 96.13 MDL-Nummer: MFCD00012275 InChI-Schlüssel: ZSBWUNDRDHVNJL-UHFFFAOYSA-N Synonym: 2-methylcyclopent-2-enone, 2-methyl-2-cyclopenten-1-one, 2-cyclopenten-1-one, 2-methyl, 2-methyl-2-cyclopentenone, cyclopentenone, 2-methyl, cyclopentenone, methyl, methyl-cyclopentenone, acmc-20af73, 2-cyclopenten-1-one, methyl, 2-cyclopenten-1-one,2-methyl PubChem CID: 14266 IUPAC-Name: 2-Methylcyclopent-2-en-1-on SMILES: CC1=CCCC1=O

2,6-Dimethoxy-1,4-Benzochinon, 97 %, ACROS Organics™

CAS: 530-55-2 Summenformel: C8H8O4 Molekulargewicht (g/mol): 168.15 MDL-Nummer: MFCD00016368 InChI-Schlüssel: OLBNOBQOQZRLMP-UHFFFAOYSA-N Synonym: 2,6-dimethoxy-1,4-benzoquinone, 2,6-dimethoxy-p-benzoquinone, 2,6-dimethoxyquinone, 2,6-dimethoxybenzoquinone, 2,6-dimethoxy-p-quinone, 2,6-dimethoxysemiquinone anions, 2,5-cyclohexadiene-1,4-dione, 2,6-dimethoxy, dmbq, p-benzoquinone, 2,6-dimethoxy, 2,6-dimethoxybenzo-1,4-quinone PubChem CID: 68262 ChEBI: CHEBI:27651 IUPAC-Name: 2,6-Dimethoxycyclohexa-2,5-dien-1,4-dion SMILES: COC1=CC(=O)C=C(C1=O)OC

α,α,α-Trifluoracetophenon, 99 %, Acros Organics™

CAS: 434-45-7 Summenformel: C8H5F3O Molekulargewicht (g/mol): 174.12 MDL-Nummer: MFCD00000420 InChI-Schlüssel: KZJRKRQSDZGHEC-UHFFFAOYSA-N Synonym: trifluoroacetophenone, 2,2,2-trifluoroacetophenone, 2,2,2-trifluoro-1-phenylethan-1-one, phenyl trifluoromethyl ketone, trifluoromethyl phenyl ketone, alpha,alpha,alpha-trifluoroacetophenone, ethanone, 2,2,2-trifluoro-1-phenyl, 2,2,2-trifluoro-1-phenyl-ethanone, trifluoroacetylbenzene, unii-6t7l1upy09 PubChem CID: 9905 IUPAC-Name: 2,2,2-Trifluor-1-Phenylethan SMILES: C1=CC=C(C=C1)C(=O)C(F)(F)F

1,4-Benzochinon, 99 %, ACROS Organics™

CAS: 106-51-4 Summenformel: C6H4O2 Molekulargewicht (g/mol): 108.1 MDL-Nummer: MFCD00001591 InChI-Schlüssel: AZQWKYJCGOJGHM-UHFFFAOYSA-N Synonym: p-benzoquinone, benzoquinone, quinone, 1,4-benzoquinone, p-quinone, chinone, 2,5-cyclohexadiene-1,4-dione, cyclohexadienedione, para-quinone, 1,4-benzoquine PubChem CID: 4650 ChEBI: CHEBI:16509 IUPAC-Name: Cyclohexa-2,5-dien-1,4-dion SMILES: C1=CC(=O)C=CC1=O

2-Chlorcyclopentanon, stabilisiert 97 %, ACROS Organics™

CAS: 694-28-0 Summenformel: C5H7ClO Molekulargewicht (g/mol): 118.56 MDL-Nummer: MFCD00001410 InChI-Schlüssel: AXDZFGRFZOQVBV-UHFFFAOYSA-N Synonym: 2-chlorocyclopentanone, cyclopentanone, 2-chloro, 2-chloro-1-cyclopentanone, alpha-chlorocyclopentanone, 2-chlorocyclopentan-one, .alpha.-chlorocyclopentanone, chlorocyclopentanone, o-chlorocyclopentanone, wln: l5vtj bg, acmc-209u9b PubChem CID: 12751 IUPAC-Name: 2-Chlorocyclopentan-1-on SMILES: C1CC(C(=O)C1)Cl

2'-Methoxyacetophenon 99 %, ACROS Organics™

CAS: 579-74-8 Summenformel: C9H10O2 Molekulargewicht (g/mol): 150.18 MDL-Nummer: MFCD00008725 InChI-Schlüssel: DWPLEOPKBWNPQV-UHFFFAOYSA-N Synonym: 2'-methoxyacetophenone, 1-2-methoxyphenyl ethanone, o-methoxyacetophenone, ethanone, 1-2-methoxyphenyl, o-acetylanisole, 1-2-methoxyphenyl ethan-1-one, o-acetanisole, 2-acetylanisole, 2-methyoxyacetophenone oxime, ortho-methoxyacetophenone PubChem CID: 68481 IUPAC-Name: 1-(2-Methoxyphenyl)ethanon SMILES: CC(=O)C1=CC=CC=C1OC

Alfa Aesar™ 4-Acetylphenylisothiocyanat, 98 %

CAS: 2131-57-9 Summenformel: C9H7NOS Molekulargewicht (g/mol): 177.221 MDL-Nummer: MFCD00041100 InChI-Schlüssel: KAKXOESNHIUYJT-UHFFFAOYSA-N Synonym: 4-acetylphenyl isothiocyanate, 1-4-isothiocyanatophenyl ethanone, 4-acetylphenylisothiocyanate, 1-4-isothiocyanatophenyl ethan-1-one, acmc-20ampw, bromobenzyl-4-isothiocyanate, 4'-isothiocyanatoacetophenone, 4-acetylphenyl-isothiocyanate, phenylisothiocyanate, 4-acetyl, 1-4-isothiocyanato-phenyl-ethanone PubChem CID: 242779 IUPAC-Name: 1-(4-Isothiocyanatophenyl)ethanon SMILES: CC(=O)C1=CC=C(C=C1)N=C=S

2,5-Dimethyl-p-Benzochinon, 99 %, ACROS Organics™

CAS: 137-18-8 Summenformel: C8H8O2 Molekulargewicht (g/mol): 136.15 MDL-Nummer: MFCD00041737 InChI-Schlüssel: MYKLQMNSFPAPLZ-UHFFFAOYSA-N Synonym: 2,5-dimethyl-1,4-benzoquinone, phlorone, p-xyloquinone, 2,5-dimethyl-p-benzoquinone, 2,5-xyloquinone, 2,5-cyclohexadiene-1,4-dione, 2,5-dimethyl, 2,5-dimethylquinone, floron, 3,6-dimethyl-p-benzoquinone, floron czech PubChem CID: 8718 IUPAC-Name: 2,5-Dimethylcyclohexa-2,5-dien-1,4-dion SMILES: CC1=CC(=O)C(=CC1=O)C

2-Amino-4'-methoxyacetophenon-Hydrochlorid, 97 %, ACROS Organics™

CAS: 3883-94-1 Summenformel: C9H11NO2·ClH Molekulargewicht (g/mol): 201.65 MDL-Nummer: MFCD00193078 InChI-Schlüssel: FZVYWBMMOSHMRS-UHFFFAOYSA-N Synonym: 2-amino-1-4-methoxyphenyl ethanone hydrochloride, 2-amino-4'-methoxyacetophenone hydrochloride, 2-amino-1-4-methoxyphenyl ethan-1-one hydrochloride, 4-methoxyphenacylamine hydrochloride, ethanone, 2-amino-1-4-methoxyphenyl-, hydrochloride, 2-amino-1-4-methoxyphenyl ethan-1-one, chloride, pubchem22350, acmc-1ad40, 4-aminoacetyl anisole hydrochloride, 2-amino-4-methoxyacetophenone hydrochloride PubChem CID: 12487188 IUPAC-Name: 2-Amino-1-(4-Methoxyphenyl)butanhydrochlorid SMILES: COC1=CC=C(C=C1)C(=O)CN.Cl

Salicylaldazin, 99 %, Acros Organics™

CAS: 959-36-4 Summenformel: C14H12N2O2 Molekulargewicht (g/mol): 240.26 InChI-Schlüssel: SPEXYYIULCBQJR-UHFFFAOYSA-N Synonym: salicylaldehyde azine, salicylalazine, salicylaldazine, benzaldehyde, 2-hydroxy-, 2-hydroxyphenyl methylene hydrazone, 2-hydroxybenzaldehyde azine, 2-1e-e-2-2-hydroxyphenyl methylidene hydrazin-1-ylidene methyl phenol, 2,2'-1,2-hydrazinediylidenedi methylylidene diphenol, benzaldehyde, 2-hydroxy-, 2-2-hydroxyphenyl methylene hydrazone, 1,2-bis e-salicylidene hydrazine, 6-6-oxo-1-cyclohexa-2,4-dienylidene methylhydrazo methylidene-1-cyclohexa-2,4-dienone PubChem CID: 6849893 IUPAC-Name: 6-[[2-[(6-Oxocyclohexa-2,4-dien-1-yliden)methyl]hydrazinyl]methyliden]cyclohexa-2,4-dien-1-on SMILES: C1=CC(=CNNC=C2C=CC=CC2=O)C(=O)C=C1

2-Acetylpyridin, 98 %, ACROS Organics™

CAS: 1122-62-9 Summenformel: C7H7NO Molekulargewicht (g/mol): 121.14 InChI-Schlüssel: AJKVQEKCUACUMD-UHFFFAOYSA-N Synonym: 2-acetylpyridine, 1-pyridin-2-yl ethanone, methyl 2-pyridyl ketone, 2-acetopyridine, 2-pyridyl methyl ketone, acetylpyridine, ethanone, 1-2-pyridinyl, ketone, methyl 2-pyridyl, 1-pyridin-2-yl ethan-1-one, 1-2-pyridinyl ethanone PubChem CID: 14286 IUPAC-Name: 1-Pyridin-2-ylethan SMILES: CC(=O)C1=CC=CC=N1

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