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吡喃吡啶类

中文名称 英文名称 CAS号 化学式 结构式图片
—— 2-{[8,8-dimethyl-11-(morpholin-4-yl)-7,10-dihydro-8H-pyrano[4'',3'':4',5']pyrido[3',2':4,5]thieno[2,3-e][1,2,4]triazolo[4,3-c]pyrimidin-3-yl]sulfanyl}-N-(4-methoxyphenyl)acetamide —— C28H29N7O4S2
2-{[8,8-dimethyl-11-(morpholin-4-yl)-7,10-dihydro-8H-pyrano[4'',3'':4',5']pyrido[3',2':4,5]thieno[2,3-e][1,2,4]triazolo[4,3-c]pyrimidin-3-yl]sulfanyl}-N-(4-methoxyphenyl)acetamide
—— 8-ethoxy-2,2-dimethyl-10-(methylsulfanyl)-5-(morpholin-4-yl)-1,4-dihydro-2H-pyrano[4'',3'':4',5']pyrido[3',2':4,5]thieno[3,2-d]pyrimidine —— C21H26N4O3S2
8-ethoxy-2,2-dimethyl-10-(methylsulfanyl)-5-(morpholin-4-yl)-1,4-dihydro-2H-pyrano[4'',3'':4',5']pyrido[3',2':4,5]thieno[3,2-d]pyrimidine
—— methyl 2-amino-4-(3,4-dichlorophenyl)-7-methyl-5-oxo-5,6-dihydro-4H-pyrano[3,2-c]pyridine-3-carboxylate —— C17H14Cl2N2O4
methyl 2-amino-4-(3,4-dichlorophenyl)-7-methyl-5-oxo-5,6-dihydro-4H-pyrano[3,2-c]pyridine-3-carboxylate
—— 2,2-dimethyl-8-(2-methylpiperidin-1-yl)-10-(methylsulfanyl)-5-(morpholin-4-yl)-1,4-dihydro-2H-pyrano[4'',3'':4',5']pyrido[3',2':4,5]thieno[3,2-d]pyrimidine —— C25H33N5O2S2
2,2-dimethyl-8-(2-methylpiperidin-1-yl)-10-(methylsulfanyl)-5-(morpholin-4-yl)-1,4-dihydro-2H-pyrano[4'',3'':4',5']pyrido[3',2':4,5]thieno[3,2-d]pyrimidine
—— 4,4,8-Trimethyl-13-phenyl-5,11-dioxa-9,14,16-triazatetracyclo[8.7.0.02,7.012,17]heptadeca-1,7,9,12(17)-tetraen-15-one —— C21H21N3O3
4,4,8-Trimethyl-13-phenyl-5,11-dioxa-9,14,16-triazatetracyclo[8.7.0.02,7.012,17]heptadeca-1,7,9,12(17)-tetraen-15-one
—— 1,1'-{[2,2-dimethyl-5-(pyrrolidin-1-yl)-1,4-dihydro-2H-pyrano[4'',3'':4',5']pyrido[3',2':4,5]thieno[3,2-d]pyrimidin-8-yl]imino}dipropan-2-ol —— C24H33N5O3S
1,1'-{[2,2-dimethyl-5-(pyrrolidin-1-yl)-1,4-dihydro-2H-pyrano[4'',3'':4',5']pyrido[3',2':4,5]thieno[3,2-d]pyrimidin-8-yl]imino}dipropan-2-ol
—— 2-amino-7-methyl-6-(4-methylbenzyl)-5-oxo-4-(thiophen-2-yl)-5,6-dihydro-4H-pyrano[3,2-c]pyridine-3-carbonitrile —— C22H19N3O2S
2-amino-7-methyl-6-(4-methylbenzyl)-5-oxo-4-(thiophen-2-yl)-5,6-dihydro-4H-pyrano[3,2-c]pyridine-3-carbonitrile
—— (4S,8Z)-4-(3-bromophenyl)-8-[(3-bromophenyl)methylidene]-1,3,4,5-tetrahydrothiopyrano[4,3-d]pyrimidine-2-thione —— C20H16Br2N2S2
(4S,8Z)-4-(3-bromophenyl)-8-[(3-bromophenyl)methylidene]-1,3,4,5-tetrahydrothiopyrano[4,3-d]pyrimidine-2-thione
—— (4S,8Z)-4-(4-propan-2-ylphenyl)-8-[(4-propan-2-ylphenyl)methylidene]-1,3,4,5-tetrahydrothiopyrano[4,3-d]pyrimidine-2-thione —— C26H30N2S2
(4S,8Z)-4-(4-propan-2-ylphenyl)-8-[(4-propan-2-ylphenyl)methylidene]-1,3,4,5-tetrahydrothiopyrano[4,3-d]pyrimidine-2-thione
—— 2-{[2,2-dimethyl-5-isobutyl-10-(methylthio)-1,4-dihydro-2H-pyrano[4'',3'':4',5']pyrido-[3',2':4,5]thieno[3,2-d]pyrimidin-8-yl]thio}acetamide —— C21H26N4O2S3
2-{[2,2-dimethyl-5-isobutyl-10-(methylthio)-1,4-dihydro-2H-pyrano[4'',3'':4',5']pyrido-[3',2':4,5]thieno[3,2-d]pyrimidin-8-yl]thio}acetamide
—— (4S,8Z)-4-(4-chlorophenyl)-8-[(4-chlorophenyl)methylidene]-1,3,4,5-tetrahydrothiopyrano[4,3-d]pyrimidine-2-thione —— C20H16Cl2N2S2
(4S,8Z)-4-(4-chlorophenyl)-8-[(4-chlorophenyl)methylidene]-1,3,4,5-tetrahydrothiopyrano[4,3-d]pyrimidine-2-thione
—— (2S,3R,4R)-3-butyl-2-hydroxy-7-methyl-4-pentyl-2,3,4,6-tetrahydropyrano[3,2-c]pyridin-5-one —— C18H29NO3
(2S,3R,4R)-3-butyl-2-hydroxy-7-methyl-4-pentyl-2,3,4,6-tetrahydropyrano[3,2-c]pyridin-5-one
—— (2S,3R,4S)-3-butyl-2-hydroxy-7-methyl-4-pentyl-2,3,4,6-tetrahydropyrano[3,2-c]pyridin-5-one —— C18H29NO3
(2S,3R,4S)-3-butyl-2-hydroxy-7-methyl-4-pentyl-2,3,4,6-tetrahydropyrano[3,2-c]pyridin-5-one
—— 2-amino-6-[3-(1H-imidazol-1-yl)propyl]-7-methyl-5-oxo-4-phenyl-5,6-dihydro-4H-pyrano[3,2-c]pyridine-3-carbonitrile —— C22H21N5O2
2-amino-6-[3-(1H-imidazol-1-yl)propyl]-7-methyl-5-oxo-4-phenyl-5,6-dihydro-4H-pyrano[3,2-c]pyridine-3-carbonitrile
—— N-(2,4-dichlorophenyl)-2-{[8,8-dimethyl-11-(morpholin-4-yl)-7,10-dihydro-8H-pyrano[4'',3'':4',5']pyrido[3',2':4,5]thieno[2,3-e][1,2,4]triazolo[4,3-c]pyrimidin-3-yl]sulfanyl}acetamide —— C27H25Cl2N7O3S2
N-(2,4-dichlorophenyl)-2-{[8,8-dimethyl-11-(morpholin-4-yl)-7,10-dihydro-8H-pyrano[4'',3'':4',5']pyrido[3',2':4,5]thieno[2,3-e][1,2,4]triazolo[4,3-c]pyrimidin-3-yl]sulfanyl}acetamide
—— (4R)-4-ethyl-4-hydroxy-6-methyl-1,7-dihydropyrano[3,4-c]pyridine-3,8-dione —— C11H13NO4
(4R)-4-ethyl-4-hydroxy-6-methyl-1,7-dihydropyrano[3,4-c]pyridine-3,8-dione
—— (4S)-4-ethyl-4-hydroxy-6-methyl-1,7-dihydropyrano[3,4-c]pyridine-3,8-dione —— C11H13NO4
(4S)-4-ethyl-4-hydroxy-6-methyl-1,7-dihydropyrano[3,4-c]pyridine-3,8-dione
—— 2-(8,8-dimethyl-4-oxo-7,10-dihydro-8H-pyrano[3'',4'':5',6']pyrido[3',2':4,5]thieno[3,2-d]pyrimidin-3(4H)-yl)-N-phenylpropanamide —— C23H22N4O3S
2-(8,8-dimethyl-4-oxo-7,10-dihydro-8H-pyrano[3'',4'':5',6']pyrido[3',2':4,5]thieno[3,2-d]pyrimidin-3(4H)-yl)-N-phenylpropanamide
—— (4R,8Z)-4-(4-propan-2-ylphenyl)-8-[(4-propan-2-ylphenyl)methylidene]-1,3,4,5-tetrahydrothiopyrano[4,3-d]pyrimidine-2-thione —— C26H30N2S2
(4R,8Z)-4-(4-propan-2-ylphenyl)-8-[(4-propan-2-ylphenyl)methylidene]-1,3,4,5-tetrahydrothiopyrano[4,3-d]pyrimidine-2-thione
—— (4R,8Z)-4-(3-bromophenyl)-8-[(3-bromophenyl)methylidene]-1,3,4,5-tetrahydrothiopyrano[4,3-d]pyrimidine-2-thione —— C20H16Br2N2S2
(4R,8Z)-4-(3-bromophenyl)-8-[(3-bromophenyl)methylidene]-1,3,4,5-tetrahydrothiopyrano[4,3-d]pyrimidine-2-thione
—— (4R,8Z)-4-(4-chlorophenyl)-8-[(4-chlorophenyl)methylidene]-1,3,4,5-tetrahydrothiopyrano[4,3-d]pyrimidine-2-thione —— C20H16Cl2N2S2
(4R,8Z)-4-(4-chlorophenyl)-8-[(4-chlorophenyl)methylidene]-1,3,4,5-tetrahydrothiopyrano[4,3-d]pyrimidine-2-thione
—— 2-amino-4-(3,4-diethoxyphenyl)-7-methyl-5-oxo-6-(2-phenylethyl)-5,6-dihydro-4H-pyrano[3,2-c]pyridine-3-carbonitrile —— C28H29N3O4
2-amino-4-(3,4-diethoxyphenyl)-7-methyl-5-oxo-6-(2-phenylethyl)-5,6-dihydro-4H-pyrano[3,2-c]pyridine-3-carbonitrile
—— Methyl 2'-amino-1-(3,4-dichlorobenzyl)-7'-methyl-2,5'-dioxo-6'-(tetrahydrofuran-2-ylmethyl)-1,2,5',6'-tetrahydrospiro[indole-3,4'-pyrano[3,2-c]pyridine]-3'-carboxylate —— C30H27Cl2N3O6
Methyl 2'-amino-1-(3,4-dichlorobenzyl)-7'-methyl-2,5'-dioxo-6'-(tetrahydrofuran-2-ylmethyl)-1,2,5',6'-tetrahydrospiro[indole-3,4'-pyrano[3,2-c]pyridine]-3'-carboxylate
—— N-[2,2-dimethyl-10-(methylsulfanyl)-5-morpholino-1,4-dihydro-2H-pyrano[4'',3'':4',5']pyrido[3',2':4,5]thieno[3,2-d]pyrimidin-8-yl]-N-(3-pyridylmethyl)amine —— C25H28N6O2S2
N-[2,2-dimethyl-10-(methylsulfanyl)-5-morpholino-1,4-dihydro-2H-pyrano[4'',3'':4',5']pyrido[3',2':4,5]thieno[3,2-d]pyrimidin-8-yl]-N-(3-pyridylmethyl)amine
—— N-phenyl-2-(2,8,8-trimethyl-4-oxo-7,10-dihydro-8H-pyrano[3'',4'':5',6']pyrido[3',2':4,5]thieno[3,2-d]pyrimidin-3(4H)-yl)acetamide —— C23H22N4O3S
N-phenyl-2-(2,8,8-trimethyl-4-oxo-7,10-dihydro-8H-pyrano[3'',4'':5',6']pyrido[3',2':4,5]thieno[3,2-d]pyrimidin-3(4H)-yl)acetamide
—— N-hexyl-2,2-dimethyl-5-(2-methylpropyl)-10-(methylsulfanyl)-1,4-dihydro-2H-pyrano[4'',3'':4',5']pyrido[3',2':4,5]thieno[3,2-d]pyrimidin-8-amine —— C25H36N4OS2
N-hexyl-2,2-dimethyl-5-(2-methylpropyl)-10-(methylsulfanyl)-1,4-dihydro-2H-pyrano[4'',3'':4',5']pyrido[3',2':4,5]thieno[3,2-d]pyrimidin-8-amine
—— 2-amino-4-(2-chloro-6-fluorophenyl)-7-methyl-5-oxo-6-(tetrahydrofuran-2-ylmethyl)-5,6-dihydro-4H-pyrano[3,2-c]pyridine-3-carbonitrile —— C21H19ClFN3O3
2-amino-4-(2-chloro-6-fluorophenyl)-7-methyl-5-oxo-6-(tetrahydrofuran-2-ylmethyl)-5,6-dihydro-4H-pyrano[3,2-c]pyridine-3-carbonitrile
—— 2-{[5-(furan-2-yl)-2,2-dimethyl-10-(methylsulfanyl)-1,4-dihydro-2H-pyrano[4'',3'':4',5']pyrido[3',2':4,5]thieno[3,2-d]pyrimidin-8-yl]sulfanyl}-1-(morpholin-4-yl)ethanone —— C25H26N4O4S3
2-{[5-(furan-2-yl)-2,2-dimethyl-10-(methylsulfanyl)-1,4-dihydro-2H-pyrano[4'',3'':4',5']pyrido[3',2':4,5]thieno[3,2-d]pyrimidin-8-yl]sulfanyl}-1-(morpholin-4-yl)ethanone
—— ethyl (4R)-2-amino-6-benzyl-4-(2-fluorophenyl)-7-methyl-5-oxo-4H-pyrano[3,2-c]pyridine-3-carboxylate —— C25H23FN2O4
ethyl (4R)-2-amino-6-benzyl-4-(2-fluorophenyl)-7-methyl-5-oxo-4H-pyrano[3,2-c]pyridine-3-carboxylate
—— 2-amino-4-(4-ethoxy-3-methoxyphenyl)-7-methyl-5-oxo-6-(tetrahydrofuran-2-ylmethyl)-5,6-dihydro-4H-pyrano[3,2-c]pyridine-3-carbonitrile —— C24H27N3O5
2-amino-4-(4-ethoxy-3-methoxyphenyl)-7-methyl-5-oxo-6-(tetrahydrofuran-2-ylmethyl)-5,6-dihydro-4H-pyrano[3,2-c]pyridine-3-carbonitrile
—— 2-amino-4-(2-chlorophenyl)-7-methyl-5-oxo-5,6-dihydro-4H-pyrano[3,2-c]pyridine-3-carbonitrile —— C16H12ClN3O2
2-amino-4-(2-chlorophenyl)-7-methyl-5-oxo-5,6-dihydro-4H-pyrano[3,2-c]pyridine-3-carbonitrile
—— 2-amino-4-(2,4-dimethoxyphenyl)-7-methyl-5-oxo-6-(pyridin-2-ylmethyl)-5,6-dihydro-4H-pyrano[3,2-c]pyridine-3-carbonitrile —— C24H22N4O4
2-amino-4-(2,4-dimethoxyphenyl)-7-methyl-5-oxo-6-(pyridin-2-ylmethyl)-5,6-dihydro-4H-pyrano[3,2-c]pyridine-3-carbonitrile
—— 2-{[2,2-dimethyl-10-(methylsulfanyl)-5-(propan-2-yl)-1,4-dihydro-2H-pyrano[4'',3'':4',5']pyrido[3',2':4,5]thieno[3,2-d]pyrimidin-8-yl]amino}butan-1-ol —— C22H30N4O2S2
2-{[2,2-dimethyl-10-(methylsulfanyl)-5-(propan-2-yl)-1,4-dihydro-2H-pyrano[4'',3'':4',5']pyrido[3',2':4,5]thieno[3,2-d]pyrimidin-8-yl]amino}butan-1-ol
—— 8-(benzylsulfanyl)-2,2-dimethyl-10-(methylsulfanyl)-5-(morpholin-4-yl)-1,4-dihydro-2H-pyrano[4'',3'':4',5']pyrido[3',2':4,5]thieno[3,2-d]pyrimidine —— C26H28N4O2S3
8-(benzylsulfanyl)-2,2-dimethyl-10-(methylsulfanyl)-5-(morpholin-4-yl)-1,4-dihydro-2H-pyrano[4'',3'':4',5']pyrido[3',2':4,5]thieno[3,2-d]pyrimidine
—— N,N-dibutyl-5-(furan-2-yl)-2,2-dimethyl-1,4-dihydro-2H-pyrano[4'',3'':4',5']pyrido[3',2':4,5]thieno[3,2-d]pyrimidin-8-amine —— C26H32N4O2S
N,N-dibutyl-5-(furan-2-yl)-2,2-dimethyl-1,4-dihydro-2H-pyrano[4'',3'':4',5']pyrido[3',2':4,5]thieno[3,2-d]pyrimidin-8-amine
—— 1-{[2,2-dimethyl-5-(propan-2-yl)-1,4-dihydro-2H-pyrano[4'',3'':4',5']pyrido[3',2':4,5]thieno[3,2-d]pyrimidin-8-yl]amino}propan-2-ol —— C20H26N4O2S
1-{[2,2-dimethyl-5-(propan-2-yl)-1,4-dihydro-2H-pyrano[4'',3'':4',5']pyrido[3',2':4,5]thieno[3,2-d]pyrimidin-8-yl]amino}propan-2-ol
—— N-Benzyl-2-(8,8-dimethyl-1-oxo-8,9-dihydro-1H,6H-7-oxa-11-thia-2,4,10-triaza-benzo[b]fluoren-2-yl)-ac etamide —— C23H22N4O3S
N-Benzyl-2-(8,8-dimethyl-1-oxo-8,9-dihydro-1H,6H-7-oxa-11-thia-2,4,10-triaza-benzo[b]fluoren-2-yl)-ac etamide
—— 2-amino-4-(2,5-dimethoxyphenyl)-7-methyl-6-(4-methylbenzyl)-5-oxo-5,6-dihydro-4H-pyrano[3,2-c]pyridine-3-carbonitrile —— C26H25N3O4
2-amino-4-(2,5-dimethoxyphenyl)-7-methyl-6-(4-methylbenzyl)-5-oxo-5,6-dihydro-4H-pyrano[3,2-c]pyridine-3-carbonitrile
—— 2-amino-4-(3-chlorophenyl)-6-(3,4-dimethoxyphenethyl)-7-methyl-5-oxo-5,6-dihydro-4H-pyrano[3,2-c]pyridine-3-carbonitrile —— C26H24ClN3O4
2-amino-4-(3-chlorophenyl)-6-(3,4-dimethoxyphenethyl)-7-methyl-5-oxo-5,6-dihydro-4H-pyrano[3,2-c]pyridine-3-carbonitrile
—— ethyl {[2,2-dimethyl-5-(pyrrolidin-1-yl)-1,4-dihydro-2H-pyrano[4'',3'':4',5']pyrido[3',2':4,5]thieno[3,2-d]pyrimidin-8-yl]sulfanyl}acetate —— C22H26N4O3S2
ethyl {[2,2-dimethyl-5-(pyrrolidin-1-yl)-1,4-dihydro-2H-pyrano[4'',3'':4',5']pyrido[3',2':4,5]thieno[3,2-d]pyrimidin-8-yl]sulfanyl}acetate
—— 2-amino-4-(6-bromo-1,3-benzodioxol-5-yl)-6-[2-(3,4-dimethoxyphenyl)ethyl]-7-methyl-5-oxo-5,6-dihydro-4H-pyrano[3,2-c]pyridine-3-carbonitrile —— C27H24BrN3O6
2-amino-4-(6-bromo-1,3-benzodioxol-5-yl)-6-[2-(3,4-dimethoxyphenyl)ethyl]-7-methyl-5-oxo-5,6-dihydro-4H-pyrano[3,2-c]pyridine-3-carbonitrile
—— 2-amino-4-(furan-2-yl)-6,7-dimethyl-5-oxo-5,6-dihydro-4H-pyrano[3,2-c]pyridine-3-carbonitrile —— C15H13N3O3
2-amino-4-(furan-2-yl)-6,7-dimethyl-5-oxo-5,6-dihydro-4H-pyrano[3,2-c]pyridine-3-carbonitrile
—— 8-(butan-2-yloxy)-2,2-dimethyl-5-(pyrrolidin-1-yl)-1,4-dihydro-2H-pyrano[4'',3'':4',5']pyrido[3',2':4,5]thieno[3,2-d]pyrimidine —— C22H28N4O2S
8-(butan-2-yloxy)-2,2-dimethyl-5-(pyrrolidin-1-yl)-1,4-dihydro-2H-pyrano[4'',3'':4',5']pyrido[3',2':4,5]thieno[3,2-d]pyrimidine
—— 2-{[2,2-dimethyl-5-(2-methylpropyl)-10-(methylsulfanyl)-1,4-dihydro-2H-pyrano[4'',3'':4',5']pyrido[3',2':4,5]thieno[3,2-d]pyrimidin-8-yl]amino}butan-1-ol —— C23H32N4O2S2
2-{[2,2-dimethyl-5-(2-methylpropyl)-10-(methylsulfanyl)-1,4-dihydro-2H-pyrano[4'',3'':4',5']pyrido[3',2':4,5]thieno[3,2-d]pyrimidin-8-yl]amino}butan-1-ol
—— methyl 2-amino-4-(3,4-dichlorophenyl)-6-(furan-2-ylmethyl)-7-methyl-5-oxo-5,6-dihydro-4H-pyrano[3,2-c]pyridine-3-carboxylate —— C22H18Cl2N2O5
methyl 2-amino-4-(3,4-dichlorophenyl)-6-(furan-2-ylmethyl)-7-methyl-5-oxo-5,6-dihydro-4H-pyrano[3,2-c]pyridine-3-carboxylate
—— N-(2,2-dimethoxyethyl)-2,2-dimethyl-10-(methylsulfanyl)-5-(morpholin-4-yl)-1,4-dihydro-2H-pyrano[4'',3'':4',5']pyrido[3',2':4,5]thieno[3,2-d]pyrimidin-8-amine —— C23H31N5O4S2
N-(2,2-dimethoxyethyl)-2,2-dimethyl-10-(methylsulfanyl)-5-(morpholin-4-yl)-1,4-dihydro-2H-pyrano[4'',3'':4',5']pyrido[3',2':4,5]thieno[3,2-d]pyrimidin-8-amine
—— (5-Furan-2-yl-2,2-dimethyl-10-methylsulfanyl-1,4-dihydro-2H-3-oxa-7-thia-6,9,11-triaza-benzo[c]fluoren-8-ylsulfanyl)-acetic acid methyl ester —— C22H21N3O4S3
(5-Furan-2-yl-2,2-dimethyl-10-methylsulfanyl-1,4-dihydro-2H-3-oxa-7-thia-6,9,11-triaza-benzo[c]fluoren-8-ylsulfanyl)-acetic acid methyl ester
—— 2,2-dimethyl-N-(2-methylpropyl)-10-(methylsulfanyl)-5-(morpholin-4-yl)-1,4-dihydro-2H-pyrano[4'',3'':4',5']pyrido[3',2':4,5]thieno[3,2-d]pyrimidin-8-amine —— C23H31N5O2S2
2,2-dimethyl-N-(2-methylpropyl)-10-(methylsulfanyl)-5-(morpholin-4-yl)-1,4-dihydro-2H-pyrano[4'',3'':4',5']pyrido[3',2':4,5]thieno[3,2-d]pyrimidin-8-amine
—— 1,1'-{[2,2-dimethyl-10-(methylsulfanyl)-5-(propan-2-yl)-1,4-dihydro-2H-pyrano[4'',3'':4',5']pyrido[3',2':4,5]thieno[3,2-d]pyrimidin-8-yl]imino}dipropan-2-ol —— C24H34N4O3S2
1,1'-{[2,2-dimethyl-10-(methylsulfanyl)-5-(propan-2-yl)-1,4-dihydro-2H-pyrano[4'',3'':4',5']pyrido[3',2':4,5]thieno[3,2-d]pyrimidin-8-yl]imino}dipropan-2-ol
—— N-hexyl-2,2-dimethyl-10-methylsulfanyl-5-(morpholin-4-yl)-1,4-dihydro-2H-pyrano[4'',3'':4',5']pyrido[3',2':4,5]thieno[3,2-d]pyrimidin-8-amine —— C25H35N5O2S2
N-hexyl-2,2-dimethyl-10-methylsulfanyl-5-(morpholin-4-yl)-1,4-dihydro-2H-pyrano[4'',3'':4',5']pyrido[3',2':4,5]thieno[3,2-d]pyrimidin-8-amine