Oxazinanes

Rivaroxaban, 98%, Acros Organics™

CAS: 366789-02-8 Molecular Formula: C19H18ClN3O5S Molecular Weight (g/mol): 435.88 InChI Key: KGFYHTZWPPHNLQ-AWEZNQCLSA-N Synonym: rivaroxaban, xarelto, s-5-chloro-n-2-oxo-3-4-3-oxomorpholino phenyl oxazolidin-5-yl methyl thiophene-2-carboxamide, unii-9ndf7jz4m3, xarelto tn, 9ndf7jz4m3, 5-chloro-n-5s-2-oxo-3-4-3-oxomorpholin-4-yl phenyl-1,3-oxazolidin-5-yl methyl thiophene-2-carboxamide, 2-thiophenecarboxamide, 5-chloro-n-5s-2-oxo-3-4-3-oxo-4-morpholinyl phenyl-5-oxazolidinyl methyl, 5-chloro-n-5s-2-oxo-3-4-3-oxo-4-morpholinyl phenyl-5-oxazolidinyl methyl-2-thiophenecarboxamide PubChem CID: 9875401 ChEBI: CHEBI:68579 IUPAC Name: 5-chloro-N-[[(5S)-2-oxo-3-[4-(3-oxomorpholin-4-yl)phenyl]-1,3-oxazolidin-5-yl]methyl]thiophene-2-carboxamide SMILES: C1COCC(=O)N1C2=CC=C(C=C2)N3CC(OC3=O)CNC(=O)C4=CC=C(S4)Cl

Ethyl 2-morpholinobenzoate, 97%, Maybridge

CAS: 192817-79-1 Molecular Formula: C13H17NO3 Molecular Weight (g/mol): 235.283 MDL Number: MFCD06204497 InChI Key: UIVDSGDHUXOYDW-UHFFFAOYSA-N Synonym: ethyl 2-morpholinobenzoate, ethyl 2-morpholin-4-yl benzoate, 2-morpholin-4-yl-benzoic acid ethyl ester, benzoic acid,2-4-morpholinyl-,ethyl ester, 2-morpholin-4-ylbenzoic acid ethyl ester, benzoic acid,2-4-morpholinyl-, ethyl ester PubChem CID: 7148401 IUPAC Name: ethyl 2-morpholin-4-ylbenzoate SMILES: CCOC(=O)C1=CC=CC=C1N2CCOCC2

Alfa Aesar™ 4-(4-Morpholinylcarbonyl)benzeneboronic acid, 98%

CAS: 389621-84-5 Molecular Formula: C11H14BNO4 Molecular Weight (g/mol): 235.046 MDL Number: MFCD03411952 InChI Key: KMNLIQJXZPBCDU-UHFFFAOYSA-N Synonym: 4-morpholine-4-carbonyl phenylboronic acid, 4-morpholine-4-carbonyl phenyl boronic acid, 4-morpholinocarbonyl phenyl boronic acid, 4-4-boronobenzoyl morpholine, 4-morpholine-4-carbonyl benzeneboronic acid, boronic acid, 4-4-morpholinylcarbonyl phenyl, 4-boronophenyl morpholin-4-yl methanone, 4-morpholin-4-ylcarbonyl benzeneboronic acid, boronic acid,b-4-4-morpholinylcarbonyl phenyl PubChem CID: 2773546 IUPAC Name: [4-(morpholine-4-carbonyl)phenyl]boronic acid SMILES: B(C1=CC=C(C=C1)C(=O)N2CCOCC2)(O)O

Alfa Aesar™ 3-(4-Morpholinylcarbonyl)benzeneboronic acid, 98%

CAS: 723281-55-8 Molecular Formula: C11H14BNO4 Molecular Weight (g/mol): 235.046 MDL Number: MFCD04115687 InChI Key: DRZFURCXDFRZNR-UHFFFAOYSA-N Synonym: 3-morpholine-4-carbonyl phenylboronic acid, n-morpholinyl 3-boronobenzamide, 3-morpholine-4-carbonyl benzeneboronic acid, 3-morpholine-4-carbonyl phenyl boronic acid, 3-morpholin-4-ylcarbonyl phenylboronic acid, boronic acid, 3-4-morpholinylcarbonyl phenyl, acmc-209omm, 4-3-boronobenzoyl morpholine, 3-morpholin-4-carbonyl phenylboronic acid PubChem CID: 3602916 IUPAC Name: [3-(morpholine-4-carbonyl)phenyl]boronic acid SMILES: B(C1=CC(=CC=C1)C(=O)N2CCOCC2)(O)O

Alfa Aesar™ 4-(2-Chloro-4-nitrophenyl)morpholine, 97%

CAS: 55435-71-7 Molecular Formula: C10H11ClN2O3 Molecular Weight (g/mol): 242.659 MDL Number: MFCD00052898 InChI Key: ZPKGWYXJULKUEH-UHFFFAOYSA-N Synonym: 4-2-chloro-4-nitrophenyl morpholine, morpholine, 4-2-chloro-4-nitrophenyl, n-2-chloro-4-nitrophenyl morpholine, 4-2-chloro-4-nitro-phenyl-morpholine, 3-chloro-4-morpholino-1-nitrobenzene, maybridge1_003410, acmc-1b11p, morpholine,4-2-chloro-4-nitrophenyl, 3-chloro-4-morpholin-4-yl-1-nitro-benzene PubChem CID: 108711 IUPAC Name: 4-(2-chloro-4-nitrophenyl)morpholine SMILES: C1COCCN1C2=C(C=C(C=C2)[N+](=O)[O-])Cl

7-Bromo-4-methyl-3,4-dihydro-2H-1,4-benzoxazine, 95%, Maybridge

CAS: 154264-95-6 Molecular Formula: C9H10BrNO Molecular Weight (g/mol): 228.089 MDL Number: MFCD02681913 InChI Key: MQMFOFZKZBLSAB-UHFFFAOYSA-N Synonym: 7-bromo-4-methyl-3,4-dihydro-2h-1,4-benzoxazine, 7-bromo-3,4-dihydro-4-methyl-2h-1,4-benzoxazine, 2h-1,4-benzoxazine, 7-bromo-3,4-dihydro-4-methyl, 7-bromo-4-methyl-3,4-dihydro-2h-benzo b 1,4 oxazine, 7-bromo-4-methyl-2h,3h-benzo e 1,4-oxazine, 2h-1,4-benzoxazine,7-bromo-3,4-dihydro-4-methyl, 7-bromo-4-methyl-3,4-dihydro-2h-benzo 1,4 oxazine PubChem CID: 2776405 IUPAC Name: 7-bromo-4-methyl-2,3-dihydro-1,4-benzoxazine SMILES: CN1CCOC2=C1C=CC(=C2)Br

Alfa Aesar™ 4-(4-Morpholinylcarbonyl)benzeneboronic acid pinacol ester, 97%

CAS: 656239-38-2 Molecular Formula: C17H24BNO4 Molecular Weight (g/mol): 317.192 MDL Number: MFCD05863913 InChI Key: ZOPBEWUNCNLYSD-UHFFFAOYSA-N Synonym: morpholino 4-4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl phenyl methanone, 4-morpholine-4-carbonyl phenylboronic acid pinacol ester, 4-morpholinocarbonyl phenylboronic acid, pinacol ester, 4-4-4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl benzoyl morpholine, 4-morpholine carboxamidophenylboronic acid, pinacol ester, morpholine, 4-4-4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl benzoyl, morpholin-4-yl-4-4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl-phenyl-methanone, morpholin-4-yl-4-4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl phenyl methanone, 4-4-morpholinylcarbonyl benzeneboronic acid pinacol ester, 4-morpholine-4-carbonyl phenyl boronic acid pinacol ester PubChem CID: 2760141 IUPAC Name: morpholin-4-yl-[4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl]methanone SMILES: B1(OC(C(O1)(C)C)(C)C)C2=CC=C(C=C2)C(=O)N3CCOCC3

4-(4-Iodophenyl)morpholine, Maybridge

CAS: 87350-77-4 Molecular Formula: C10H12INO Molecular Weight (g/mol): 289.116 InChI Key: YUEREUIIUISPFV-UHFFFAOYSA-N Synonym: 4-4-iodophenyl morpholine, 4-iodophenylmorpholine, morpholine,4-4-iodophenyl, morpholine, 4-4-iodophenyl, 1-iodo-4-morpholin-4-yl benzene PubChem CID: 2795358 IUPAC Name: 4-(4-iodophenyl)morpholine SMILES: C1COCCN1C2=CC=C(C=C2)I

4-[3-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl]morpholine, 90%, Maybridge

CAS: 852227-95-3 Molecular Formula: C16H24BNO3 Molecular Weight (g/mol): 289.182 InChI Key: NCJDKFFODGZRRL-UHFFFAOYSA-N Synonym: 4-3-4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl phenyl morpholine, 3-morpholinophenylboronic acid pinacol ester, 3-morpholino phenylboronic acid pinacol ester, 3-4-morpholino phenylboronic acid pinacol ester, 4-3-tetramethyl-1,3,2-dioxaborolan-2-yl phenyl morpholine, pubchem19450, ksc496k1f, 3-morpholinophenylboronic acidpinacolester, 3-morpholinophenylboronic acid pinacol PubChem CID: 4192663 IUPAC Name: 4-[3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl]morpholine SMILES: B1(OC(C(O1)(C)C)(C)C)C2=CC(=CC=C2)N3CCOCC3

Alfa Aesar™ 3-(4-Morpholinyl)phenol, 98%

CAS: 27292-49-5 Molecular Formula: C10H13NO2 Molecular Weight (g/mol): 179.219 MDL Number: MFCD00051675 InChI Key: BMGSGGYIUOQZBZ-UHFFFAOYSA-N Synonym: 3-morpholinophenol, 3-morpholin-4-yl phenol, phenol, 3-4-morpholinyl, 3-4-morpholinyl phenol, 3-morpholin-4-yl-phenol, n-3-hydroxyphenyl morpholine, m-morpholinophenol, 3-morpholinylphenol, 3-morpholino phenol, 3-morpholinyl-phenol PubChem CID: 141343 IUPAC Name: 3-morpholin-4-ylphenol SMILES: C1COCCN1C2=CC(=CC=C2)O

4-Morpholinoaniline, 98+%, ACROS Organics™

CAS: 2524-67-6 Molecular Formula: C10H14N2O Molecular Weight (g/mol): 178.23 MDL Number: MFCD00006169 InChI Key: PHNDZBFLOPIMSM-UHFFFAOYSA-N Synonym: 4-morpholinoaniline, 4-morpholin-4-yl-phenylamine, 4-morpholin-4-yl aniline, n-4-aminophenyl morpholine, p-morpholinoaniline, 4-morpholinobenzenamine, 4-4-morpholino aniline, benzenamine, 4-4-morpholinyl, 4-morpholinyl aniline, 4-4-aminophenyl-morpholine PubChem CID: 75655 IUPAC Name: 4-morpholin-4-ylaniline SMILES: C1COCCN1C2=CC=C(C=C2)N

Alfa Aesar™ 3-(4-Morpholinylcarbonyl)benzeneboronic acid pinacol ester

CAS: 1036991-25-9 Molecular Formula: C17H24BNO4 Molecular Weight (g/mol): 317.192 MDL Number: MFCD09266172 InChI Key: PKONGXZPUDFPPH-UHFFFAOYSA-N Synonym: morpholino 3-4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl phenyl methanone, 3-morpholine-4-carbonyl phenylboronic acid pinacol ester, 4-3-4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl benzoyl morpholine, 3-4-morpholinylcarbonyl benzeneboronic acid pinacol ester, 3-4-morpholinylcarbonyl phenylboronic acid pinacol ester, 3-morpholine-4-carbonyl phenyl boronic acid pinacol ester, amtb027, 4-3-tetramethyl-1,3,2-dioxaborolan-2-yl benzoyl morpholine PubChem CID: 46739724 IUPAC Name: morpholin-4-yl-[3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl]methanone SMILES: B1(OC(C(O1)(C)C)(C)C)C2=CC(=CC=C2)C(=O)N3CCOCC3

4-[2-(Chloromethyl)-4-(trifluoromethyl)phenyl]morpholine, 97%, Maybridge

CAS: 892502-15-7 Molecular Formula: C12H13ClF3NO Molecular Weight (g/mol): 279.687 MDL Number: MFCD09025889 InChI Key: KCGVSWOLBMMCMW-UHFFFAOYSA-N Synonym: 4-2-chloromethyl-4-trifluoromethyl phenyl morpholine, morpholine,4-2-chloromethyl-4-trifluoromethyl phenyl PubChem CID: 18525887 IUPAC Name: 4-[2-(chloromethyl)-4-(trifluoromethyl)phenyl]morpholine SMILES: C1COCCN1C2=C(C=C(C=C2)C(F)(F)F)CCl

Alfa Aesar™ 4-(2-Fluoro-6-nitrophenyl)morpholine, 97%

CAS: 1233955-40-2 Molecular Formula: C10H11FN2O3 Molecular Weight (g/mol): 226.207 MDL Number: MFCD13689260 InChI Key: RVPOFXBMBJKJJK-UHFFFAOYSA-N Synonym: 4-2-fluoro-6-nitrophenyl morpholine PubChem CID: 53255510 IUPAC Name: 4-(2-fluoro-6-nitrophenyl)morpholine SMILES: C1COCCN1C2=C(C=CC=C2F)[N+](=O)[O-]

(3-Morpholinophenyl)methanol, 97%, Maybridge

CAS: 145127-38-4 Molecular Formula: C11H15NO2 Molecular Weight (g/mol): 193.246 MDL Number: MFCD07772812 InChI Key: MXBVALXTJZMIJB-UHFFFAOYSA-N Synonym: 3-morpholinophenyl methanol, 3-morpholinobenzyl alcohol, 3-morpholin-4-yl phenyl methanol, 3-morpholin-4-ylphenyl methanol, benzenemethanol,3-4-morpholinyl, benzenemethanol, 3-4-morpholinyl, 3-morpholinobenzylalcohol, acmc-20n4f1, 3-morpholin-4-ylphenyl methan-1-ol PubChem CID: 7162074 IUPAC Name: (3-morpholin-4-ylphenyl)methanol SMILES: C1COCCN1C2=CC=CC(=C2)CO

2-Morpholinophenol, 97%, Maybridge

CAS: 41536-44-1 Molecular Formula: C10H13NO2 Molecular Weight (g/mol): 179.219 MDL Number: MFCD00051674 InChI Key: VMPYFWTYGZZUMY-UHFFFAOYSA-N Synonym: 2-morpholinophenol, 2-morpholin-4-yl phenol, 2-4-morpholino phenol, phenol, 2-4-morpholinyl, 2-4-morpholinyl phenol, 2-morpholin-4-yl-phenol, 2-4-morpholinyl-phenol, phenol,2-4-morpholinyl PubChem CID: 2795394 IUPAC Name: 2-morpholin-4-ylphenol SMILES: C1COCCN1C2=CC=CC=C2O

Alfa Aesar™ 4-(4-Morpholinyl)benzonitrile, 98%

CAS: 10282-31-2 Molecular Formula: C11H12N2O Molecular Weight (g/mol): 188.23 MDL Number: MFCD00100115 InChI Key: ZSCUWVQXQDCSRV-UHFFFAOYSA-N Synonym: 4-morpholinobenzonitrile, 4-4-cyanophenyl morpholine, 4-morpholin-4-yl benzonitrile, 4-4-morpholinyl benzonitrile, 4-morpholin-4-yl-benzonitrile, benzonitrile, 4-4-morpholinyl, benzonitrile,4-4-morpholinyl, 4-morpholin-4-ylbenzenecarbonitrile, pubchem18708, acmc-1bqst PubChem CID: 394808 IUPAC Name: 4-morpholin-4-ylbenzonitrile SMILES: C1COCCN1C2=CC=C(C=C2)C#N

3-morpholin-4-ylaniline, 97%, Maybridge

CAS: 159724-40-0 Molecular Formula: C10H14N2O Molecular Weight (g/mol): 178.235 InChI Key: ZJWLMZURLIHVHE-UHFFFAOYSA-N Synonym: 3-4-morpholinyl aniline, 3-morpholinoaniline, 3-morpholinobenzenamine, 3-morpholin-4-yl aniline, benzenamine, 3-4-morpholinyl, 3-morpholin-4-yl-phenylamine, 4-3-aminophenyl morpholine, 3-morpholin-4-ylphenylamine, 3-morpholinylaniline, meta-morpholino aniline PubChem CID: 847768 IUPAC Name: 3-morpholin-4-ylaniline SMILES: C1COCCN1C2=CC(=CC=C2)N

4-Morpholinophenyl isothiocyanate, Maybridge

CAS: 51317-66-9 Molecular Formula: C11H12N2OS Molecular Weight (g/mol): 220.29 InChI Key: AXUXRZZYZBZQAR-UHFFFAOYSA-N Synonym: 4-morpholinophenyl isothiocyanate, 4-4-isothiocyanatophenyl morpholine, 4-morpholinophenylisothiocyanate, morpholine, 4-4-isothiocyanatophenyl, 4-4-isothiocyanatophenyl morpholin, 4-morpholin-4-ylbenzenisothiocyanate, 4-4-morpholinyl phenyl isothiocyanate, 4-4-isothiocyanato-phenyl-morpholine, morpholine,4-4-isothiocyanatophenyl, 4-morpholin-4-yl phenyl isothiocyanate PubChem CID: 224862 IUPAC Name: 4-(4-isothiocyanatophenyl)morpholine SMILES: C1COCCN1C2=CC=C(C=C2)N=C=S

(4-methyl-3,4-dihydro-2h-1,4-benzoxazin-2-yl)methylamine, 97%, Maybridge

CAS: 282520-55-2 Molecular Formula: C10H14N2O Molecular Weight (g/mol): 178.235 MDL Number: MFCD11841068 InChI Key: VPYSMSLDVAQICD-UHFFFAOYSA-N Synonym: 4-methyl-3,4-dihydro-2h-1,4-benzoxazin-2-yl methylamine, 2-aminomethyl-3,4-dihydro-4-methyl-2h-1,4-benzoxazine, 4-methyl-2,3-dihydro-1,4-benzoxazin-2-yl methanamine, 4-methyl-3,4-dihydro-2h-benzo b 1,4 oxazin-2-yl methanamine, 1-4-methyl-2,3-dihydro-1,4-benzoxazin-2-yl methanamine, 4-methyl-2h,3h-benzo e 1,4-oxazin-2-yl methylamine, 3,4-dihydro-4-methyl-2h-1,4-benzoxazin-2-yl methylamine, 1-4-methyl-3,4-dihydro-2h-1,4-benzoxazin-2-yl methanamine, c-4-methyl-3,4-dihydro-2h-benzo 1,4 oxazin-2-yl-methylamine PubChem CID: 15550374 IUPAC Name: (4-methyl-2,3-dihydro-1,4-benzoxazin-2-yl)methanamine SMILES: CN1CC(OC2=CC=CC=C21)CN

3-Morpholinophenol, 97%, Maybridge

CAS: 27292-49-5 Molecular Formula: C10H13NO2 Molecular Weight (g/mol): 179.219 MDL Number: MFCD00051675 InChI Key: BMGSGGYIUOQZBZ-UHFFFAOYSA-N Synonym: 3-morpholinophenol, 3-morpholin-4-yl phenol, phenol, 3-4-morpholinyl, 3-4-morpholinyl phenol, 3-morpholin-4-yl-phenol, n-3-hydroxyphenyl morpholine, m-morpholinophenol, 3-morpholinylphenol, 3-morpholino phenol, 3-morpholinyl-phenol PubChem CID: 141343 IUPAC Name: 3-morpholin-4-ylphenol SMILES: C1COCCN1C2=CC(=CC=C2)O

Alfa Aesar™ 2-(4-Chlorophenyl)-2-methylmorpholine, 99%

CAS: 109461-44-1 Molecular Formula: C11H14ClNO Molecular Weight (g/mol): 211.689 MDL Number: MFCD08061115 InChI Key: IJDDASQRAPIORY-UHFFFAOYSA-N Synonym: 2-4-chlorophenyl-2-methylmorpholine, 2-4-chloro-phenyl-2-methyl-morpholine, acmc-1c8s6, morpholine,2-4-chlorophenyl-2-methyl PubChem CID: 3066043 IUPAC Name: 2-(4-chlorophenyl)-2-methylmorpholine SMILES: CC1(CNCCO1)C2=CC=C(C=C2)Cl

2-Morpholino-5-(trifluoromethyl)benzoic acid, 97%, Maybridge

CAS: 865471-20-1 Molecular Formula: C12H12F3NO3 Molecular Weight (g/mol): 275.227 MDL Number: MFCD09025883 InChI Key: PRECFTDWCNEEDB-UHFFFAOYSA-N Synonym: 2-morpholino-5-trifluoromethyl benzoic acid, 2-morpholin-4-yl-5-trifluoromethyl benzoic acid, benzoic acid,2-4-morpholinyl-5-trifluoromethyl PubChem CID: 24229572 IUPAC Name: 2-morpholin-4-yl-5-(trifluoromethyl)benzoic acid SMILES: C1COCCN1C2=C(C=C(C=C2)C(F)(F)F)C(=O)O

Alfa Aesar™ 4-(2-Chloronicotinoyl)morpholine, 97%

CAS: 53062-98-9 Molecular Formula: C10H11ClN2O2 Molecular Weight (g/mol): 226.66 MDL Number: MFCD00454210 InChI Key: SPSWDQBZCCVHNI-UHFFFAOYSA-N Synonym: 4-2-chloronicotinoyl morpholine, 4-2-chloropyridine-3-carbonyl morpholine, 4-2-chloropyridin-3-yl carbonyl morpholine, 2-chloro-3-pyridinyl 4-morpholinyl methanone, 2-chloropyridin-3-yl morpholino methanone, 4-2-chloro-3-pyridinyl carbonyl morpholine, acmc-20amr1, 2-chloronicotinic acid morpholide, 2-chloro 3-pyridyl morpholin-4-yl ketone, 2-chloro-3-pyridinyl morpholino methanone PubChem CID: 2063428 IUPAC Name: (2-chloropyridin-3-yl)-morpholin-4-ylmethanone SMILES: C1COCCN1C(=O)C2=C(N=CC=C2)Cl

Linezolid, 98%, Acros Organics™

CAS: 165800-03-3 Molecular Formula: C16H20FN3O4 Molecular Weight (g/mol): 337.35 InChI Key: TYZROVQLWOKYKF-ZDUSSCGKSA-N Synonym: linezolid, zyvox, zyvoxid, s-n-3-3-fluoro-4-morpholinophenyl-2-oxooxazolidin-5-yl methyl acetamide, zyvoxam, linezolide, linezlid, zyvoxa, linezolid usan:inn, unii-isq9i6j12j PubChem CID: 441401 ChEBI: CHEBI:63607 IUPAC Name: N-[[(5S)-3-(3-fluoro-4-morpholin-4-ylphenyl)-2-oxo-1,3-oxazolidin-5-yl]methyl]acetamide SMILES: CC(=O)NCC1CN(C(=O)O1)C2=CC(=C(C=C2)N3CCOCC3)F

2-Morpholinobenzaldehyde, 97%, Maybridge

CAS: 58028-76-5 Molecular Formula: C11H13NO2 Molecular Weight (g/mol): 191.23 MDL Number: MFCD00662562 InChI Key: GTTAEWVBVHSDLX-UHFFFAOYSA-N Synonym: 2-morpholinobenzaldehyde, 2-morpholin-4-yl-benzaldehyde, 2-4-morpholino benzaldehyde, 2-morpholin-4-yl benzaldehyde, benzaldehyde, 2-4-morpholinyl, morpholinobenzaldehyde, pubchem16276, acmc-1b05v, 2-morpholinobenzenecarbaldehyde, 4-2-formylphenyl morpholine PubChem CID: 2737010 IUPAC Name: 2-morpholin-4-ylbenzaldehyde SMILES: C1COCCN1C2=CC=CC=C2C=O

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