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三唑并嘧啶类

中文名称 英文名称 CAS号 化学式 结构式图片
—— N-[(2S)-butan-2-yl]-7,14,14-trimethyl-13-oxa-10-thia-3,5,6,8-tetrazatetracyclo[7.7.0.02,6.011,16]hexadeca-1(9),2,4,7,11(16)-pentaene-4-carboxamide —— C18H23N5O2S
N-[(2S)-butan-2-yl]-7,14,14-trimethyl-13-oxa-10-thia-3,5,6,8-tetrazatetracyclo[7.7.0.02,6.011,16]hexadeca-1(9),2,4,7,11(16)-pentaene-4-carboxamide
—— ethyl (6R,7R)-5-oxo-7-phenyl-6,7-dihydro-1H-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate —— C14H14N4O3
ethyl (6R,7R)-5-oxo-7-phenyl-6,7-dihydro-1H-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate
—— [(13S)-13-tert-butyl-10-thia-3,5,6,8-tetrazatetracyclo[7.7.0.02,6.011,16]hexadeca-1(9),2,4,7,11(16)-pentaen-4-yl]-(4-ethylpiperazin-1-yl)methanone —— C22H30N6OS
[(13S)-13-tert-butyl-10-thia-3,5,6,8-tetrazatetracyclo[7.7.0.02,6.011,16]hexadeca-1(9),2,4,7,11(16)-pentaen-4-yl]-(4-ethylpiperazin-1-yl)methanone
—— (13S)-13-tert-butyl-N,N-diethyl-10-thia-3,5,6,8-tetrazatetracyclo[7.7.0.02,6.011,16]hexadeca-1(9),2,4,7,11(16)-pentaene-4-carboxamide —— C20H27N5OS
(13S)-13-tert-butyl-N,N-diethyl-10-thia-3,5,6,8-tetrazatetracyclo[7.7.0.02,6.011,16]hexadeca-1(9),2,4,7,11(16)-pentaene-4-carboxamide
—— 7-Benzylsulfanyl-5-ethylsulfanyl-10-thia-3,4,6,8-tetrazatetracyclo[7.6.0.02,6.011,15]pentadeca-1(9),2,4,7,11(15)-pentaene —— C19H18N4S3
7-Benzylsulfanyl-5-ethylsulfanyl-10-thia-3,4,6,8-tetrazatetracyclo[7.6.0.02,6.011,15]pentadeca-1(9),2,4,7,11(15)-pentaene
—— Dimethyl-[3-(10-thia-3,5,6,8-tetrazatetracyclo[7.7.0.02,6.011,16]hexadeca-1(9),2,4,7,11(16)-pentaen-7-ylamino)propyl]azanium —— C16H23N6S+
Dimethyl-[3-(10-thia-3,5,6,8-tetrazatetracyclo[7.7.0.02,6.011,16]hexadeca-1(9),2,4,7,11(16)-pentaen-7-ylamino)propyl]azanium
—— (5R,7S)-5-(2-chlorophenyl)-7-(3-methoxyphenyl)-1,5,6,7-tetrahydro-[1,2,4]triazolo[1,5-a]pyrimidin-2-amine —— C18H18ClN5O
(5R,7S)-5-(2-chlorophenyl)-7-(3-methoxyphenyl)-1,5,6,7-tetrahydro-[1,2,4]triazolo[1,5-a]pyrimidin-2-amine
—— (5R,7S)-5-(4-ethoxyphenyl)-7-(4-methoxyphenyl)-1,5,6,7-tetrahydro-[1,2,4]triazolo[1,5-a]pyrimidine —— C20H22N4O2
(5R,7S)-5-(4-ethoxyphenyl)-7-(4-methoxyphenyl)-1,5,6,7-tetrahydro-[1,2,4]triazolo[1,5-a]pyrimidine
—— Benzyl-[(14,14-dimethyl-13-oxa-10-thia-3,5,6,8-tetrazatetracyclo[7.7.0.02,6.011,16]hexadeca-1(9),2,4,7,11(16)-pentaen-4-yl)methyl]-(2-hydroxyethyl)azanium —— C22H26N5O2S+
Benzyl-[(14,14-dimethyl-13-oxa-10-thia-3,5,6,8-tetrazatetracyclo[7.7.0.02,6.011,16]hexadeca-1(9),2,4,7,11(16)-pentaen-4-yl)methyl]-(2-hydroxyethyl)azanium
—— ethyl (5E,6R,7S)-7-(3,4-dichlorophenyl)-5-propylidene-6,7-dihydro-4H-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate —— C17H18Cl2N4O2
ethyl (5E,6R,7S)-7-(3,4-dichlorophenyl)-5-propylidene-6,7-dihydro-4H-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate
—— (14S)-14-methyl-N-(pyridin-3-ylmethyl)-10-thia-3,5,6,8-tetrazatetracyclo[7.7.0.02,6.011,16]hexadeca-1(9),2,4,7,11(16)-pentaene-4-carboxamide —— C19H18N6OS
(14S)-14-methyl-N-(pyridin-3-ylmethyl)-10-thia-3,5,6,8-tetrazatetracyclo[7.7.0.02,6.011,16]hexadeca-1(9),2,4,7,11(16)-pentaene-4-carboxamide
—— 4-(3-methylphenyl)-1-[(2-phenylethyl)sulfanyl]-7,8-dihydro-6H-cyclopenta[4,5]thieno[3,2-e][1,2,4]triazolo[4,3-a]pyrimidin-5(4H)-one —— C25H22N4OS2
4-(3-methylphenyl)-1-[(2-phenylethyl)sulfanyl]-7,8-dihydro-6H-cyclopenta[4,5]thieno[3,2-e][1,2,4]triazolo[4,3-a]pyrimidin-5(4H)-one
—— 3,7-bis(prop-2-en-1-ylsulfanyl)-11,12-dihydro-10H-cyclopenta[4,5]thieno[3,2-e]bis[1,2,4]triazolo[4,3-a:4',3'-c]pyrimidine —— C17H16N6S3
3,7-bis(prop-2-en-1-ylsulfanyl)-11,12-dihydro-10H-cyclopenta[4,5]thieno[3,2-e]bis[1,2,4]triazolo[4,3-a:4',3'-c]pyrimidine
—— 4-methyl-N-(5-oxo-2-propyl-4H-[1,2,4]triazolo[1,5-a]pyrimidin-7-yl)benzamide —— C16H17N5O2
4-methyl-N-(5-oxo-2-propyl-4H-[1,2,4]triazolo[1,5-a]pyrimidin-7-yl)benzamide
—— (13R)-3-[(2S)-2-hydroxypropyl]sulfanyl-7-(4-methoxyphenyl)-13-methyl-16-thia-2,4,5,7-tetrazatetracyclo[7.7.0.02,6.010,15]hexadeca-1(9),3,5,10(15)-tetraen-8-one —— C22H24N4O3S2
(13R)-3-[(2S)-2-hydroxypropyl]sulfanyl-7-(4-methoxyphenyl)-13-methyl-16-thia-2,4,5,7-tetrazatetracyclo[7.7.0.02,6.010,15]hexadeca-1(9),3,5,10(15)-tetraen-8-one
—— ethyl 2-[[(11R)-11-methyl-8-oxo-7-phenyl-16-thia-2,4,5,7-tetrazatetracyclo[7.7.0.02,6.010,15]hexadeca-1(9),3,5,10(15)-tetraen-3-yl]sulfanyl]acetate —— C22H22N4O3S2
ethyl 2-[[(11R)-11-methyl-8-oxo-7-phenyl-16-thia-2,4,5,7-tetrazatetracyclo[7.7.0.02,6.010,15]hexadeca-1(9),3,5,10(15)-tetraen-3-yl]sulfanyl]acetate
—— 2-[[(13S)-7-(4-methoxyphenyl)-13-methyl-8-oxo-16-thia-2,4,5,7-tetrazatetracyclo[7.7.0.02,6.010,15]hexadeca-1(9),3,5,10(15)-tetraen-3-yl]sulfanyl]acetate —— C21H19N4O4S2-
2-[[(13S)-7-(4-methoxyphenyl)-13-methyl-8-oxo-16-thia-2,4,5,7-tetrazatetracyclo[7.7.0.02,6.010,15]hexadeca-1(9),3,5,10(15)-tetraen-3-yl]sulfanyl]acetate
—— (13R)-5-benzylsulfanyl-13-methyl-7-methylsulfanyl-10-thia-3,4,6,8-tetrazatetracyclo[7.7.0.02,6.011,16]hexadeca-1(9),2,4,7,11(16)-pentaene —— C20H20N4S3
(13R)-5-benzylsulfanyl-13-methyl-7-methylsulfanyl-10-thia-3,4,6,8-tetrazatetracyclo[7.7.0.02,6.011,16]hexadeca-1(9),2,4,7,11(16)-pentaene
—— (12S)-12-ethyl-3-ethylsulfanyl-7,12-dimethyl-13-oxa-16-thia-2,4,5,7-tetrazatetracyclo[7.7.0.02,6.010,15]hexadeca-1(9),3,5,10(15)-tetraen-8-one —— C16H20N4O2S2
(12S)-12-ethyl-3-ethylsulfanyl-7,12-dimethyl-13-oxa-16-thia-2,4,5,7-tetrazatetracyclo[7.7.0.02,6.010,15]hexadeca-1(9),3,5,10(15)-tetraen-8-one
—— 3-Benzylsulfanyl-13-methyl-7-phenyl-16-thia-2,4,5,7-tetraza-13-azoniatetracyclo[7.7.0.02,6.010,15]hexadeca-1(9),3,5,10(15)-tetraen-8-one —— C24H22N5OS2+
3-Benzylsulfanyl-13-methyl-7-phenyl-16-thia-2,4,5,7-tetraza-13-azoniatetracyclo[7.7.0.02,6.010,15]hexadeca-1(9),3,5,10(15)-tetraen-8-one
—— 1-[(3,4-dichlorobenzyl)sulfanyl]-4-(4-methylphenyl)-7,8-dihydro-6H-cyclopenta[4,5]thieno[3,2-e][1,2,4]triazolo[4,3-a]pyrimidin-5(4H)-one —— C24H18Cl2N4OS2
1-[(3,4-dichlorobenzyl)sulfanyl]-4-(4-methylphenyl)-7,8-dihydro-6H-cyclopenta[4,5]thieno[3,2-e][1,2,4]triazolo[4,3-a]pyrimidin-5(4H)-one
—— 4-(4-methylphenyl)-1-(methylsulfanyl)-7,8,9,10-tetrahydro-6H-cyclohepta[4,5]thieno[3,2-e][1,2,4]triazolo[4,3-a]pyrimidin-5(4H)-one —— C20H20N4OS2
4-(4-methylphenyl)-1-(methylsulfanyl)-7,8,9,10-tetrahydro-6H-cyclohepta[4,5]thieno[3,2-e][1,2,4]triazolo[4,3-a]pyrimidin-5(4H)-one
—— 4-(4-methoxyphenyl)-7,7-dimethyl-1-[(3-methylbutyl)sulfanyl]-6,9-dihydro-7H-pyrano[4',3':4,5]thieno[3,2-e][1,2,4]triazolo[4,3-a]pyrimidin-5(4H)-one —— C24H28N4O3S2
4-(4-methoxyphenyl)-7,7-dimethyl-1-[(3-methylbutyl)sulfanyl]-6,9-dihydro-7H-pyrano[4',3':4,5]thieno[3,2-e][1,2,4]triazolo[4,3-a]pyrimidin-5(4H)-one
—— (12R)-3-methylsulfanyl-7-phenyl-12-propan-2-yl-13-oxa-16-thia-2,4,5,7-tetrazatetracyclo[7.7.0.02,6.010,15]hexadeca-1(9),3,5,10(15)-tetraen-8-one —— C20H20N4O2S2
(12R)-3-methylsulfanyl-7-phenyl-12-propan-2-yl-13-oxa-16-thia-2,4,5,7-tetrazatetracyclo[7.7.0.02,6.010,15]hexadeca-1(9),3,5,10(15)-tetraen-8-one
—— (13R)-13-tert-butyl-7-phenyl-3-prop-2-enylsulfanyl-16-thia-2,4,5,7-tetrazatetracyclo[7.7.0.02,6.010,15]hexadeca-1(9),3,5,10(15)-tetraen-8-one —— C24H26N4OS2
(13R)-13-tert-butyl-7-phenyl-3-prop-2-enylsulfanyl-16-thia-2,4,5,7-tetrazatetracyclo[7.7.0.02,6.010,15]hexadeca-1(9),3,5,10(15)-tetraen-8-one
—— 2-(2-amino-5,7-dimethyl-[1,2,4]triazolo[1,5-a]pyrimidin-6-yl)-1-[(3S)-3-methylmorpholin-4-yl]ethanone —— C14H20N6O2
2-(2-amino-5,7-dimethyl-[1,2,4]triazolo[1,5-a]pyrimidin-6-yl)-1-[(3S)-3-methylmorpholin-4-yl]ethanone
—— 3,8-Bis(benzylsulfanyl)-19-thia-2,4,5,7,9,10-hexazapentacyclo[10.7.0.02,6.07,11.013,18]nonadeca-1(12),3,5,8,10,13(18)-hexaene —— C26H22N6S3
3,8-Bis(benzylsulfanyl)-19-thia-2,4,5,7,9,10-hexazapentacyclo[10.7.0.02,6.07,11.013,18]nonadeca-1(12),3,5,8,10,13(18)-hexaene
—— 3-[(3,4-Dichlorophenyl)methylsulfanyl]-7-methyl-16-thia-2,4,5,7-tetrazatetracyclo[7.7.0.02,6.010,15]hexadeca-1(9),3,5,10(15)-tetraen-8-one —— C19H16Cl2N4OS2
3-[(3,4-Dichlorophenyl)methylsulfanyl]-7-methyl-16-thia-2,4,5,7-tetrazatetracyclo[7.7.0.02,6.010,15]hexadeca-1(9),3,5,10(15)-tetraen-8-one
—— 13-Methyl-7-(2-methylphenyl)-16-thia-2,4,5,7,13-pentazatetracyclo[7.7.0.02,6.010,15]hexadeca-1(9),3,5,10(15)-tetraen-8-one —— C18H17N5OS
13-Methyl-7-(2-methylphenyl)-16-thia-2,4,5,7,13-pentazatetracyclo[7.7.0.02,6.010,15]hexadeca-1(9),3,5,10(15)-tetraen-8-one
—— N,N-dibutyl-2-[(7-ethoxy-14,14-dimethyl-13-oxa-10-thia-3,4,6,8-tetrazatetracyclo[7.7.0.02,6.011,16]hexadeca-1(9),2,4,7,11(16)-pentaen-5-yl)sulfanyl]acetamide —— C24H35N5O3S2
N,N-dibutyl-2-[(7-ethoxy-14,14-dimethyl-13-oxa-10-thia-3,4,6,8-tetrazatetracyclo[7.7.0.02,6.011,16]hexadeca-1(9),2,4,7,11(16)-pentaen-5-yl)sulfanyl]acetamide
—— 14,14-dimethyl-4-[[(3R)-3-methylpiperidin-1-ium-1-yl]methyl]-13-oxa-10-thia-3,5,6,8-tetrazatetracyclo[7.7.0.02,6.011,16]hexadeca-1(9),2,4,7,11(16)-pentaene —— C19H26N5OS+
14,14-dimethyl-4-[[(3R)-3-methylpiperidin-1-ium-1-yl]methyl]-13-oxa-10-thia-3,5,6,8-tetrazatetracyclo[7.7.0.02,6.011,16]hexadeca-1(9),2,4,7,11(16)-pentaene
—— 7-(2-Methylphenyl)-3-sulfanylidene-16-thia-2,4,5,7-tetrazatetracyclo[7.7.0.02,6.010,15]hexadeca-1(9),5,10(15)-trien-8-one —— C18H16N4OS2
7-(2-Methylphenyl)-3-sulfanylidene-16-thia-2,4,5,7-tetrazatetracyclo[7.7.0.02,6.010,15]hexadeca-1(9),5,10(15)-trien-8-one
—— (12S)-3-methyl-7-(4-methylphenyl)-12-propan-2-yl-13-oxa-16-thia-2,4,5,7-tetrazatetracyclo[7.7.0.02,6.010,15]hexadeca-1(9),3,5,10(15)-tetraen-8-one —— C21H22N4O2S
(12S)-3-methyl-7-(4-methylphenyl)-12-propan-2-yl-13-oxa-16-thia-2,4,5,7-tetrazatetracyclo[7.7.0.02,6.010,15]hexadeca-1(9),3,5,10(15)-tetraen-8-one
—— 1-((2-chlorobenzyl)thio)-4-(4-methoxyphenyl)-7,7-dimethyl-6,7-dihydro-4H-pyrano[4',3':4,5]thieno[3,2-e][1,2,4]triazolo[4,3-a]pyrimidin-5(9H)-one —— C26H23ClN4O3S2
1-((2-chlorobenzyl)thio)-4-(4-methoxyphenyl)-7,7-dimethyl-6,7-dihydro-4H-pyrano[4',3':4,5]thieno[3,2-e][1,2,4]triazolo[4,3-a]pyrimidin-5(9H)-one
—— 5,6-dimethyl-2-[(1S)-1-[(5,6,7-trimethyl-[1,2,4]triazolo[1,5-a]pyrimidin-2-yl)sulfanyl]ethyl]-3H-thieno[2,3-d]pyrimidin-4-one —— C18H20N6OS2
5,6-dimethyl-2-[(1S)-1-[(5,6,7-trimethyl-[1,2,4]triazolo[1,5-a]pyrimidin-2-yl)sulfanyl]ethyl]-3H-thieno[2,3-d]pyrimidin-4-one
—— 2-(5,7-dimethyl-2-methylsulfanyl-[1,2,4]triazolo[1,5-a]pyrimidin-6-yl)-N-[(1R)-1-(1,5-dimethylpyrazol-4-yl)ethyl]acetamide —— C17H23N7OS
2-(5,7-dimethyl-2-methylsulfanyl-[1,2,4]triazolo[1,5-a]pyrimidin-6-yl)-N-[(1R)-1-(1,5-dimethylpyrazol-4-yl)ethyl]acetamide
—— (14,14-Dimethyl-13-oxa-10-thia-3,5,6,8-tetrazatetracyclo[7.7.0.02,6.011,16]hexadeca-1(9),2,4,7,11(16)-pentaen-4-yl)-piperidin-1-ylmethanone —— C18H21N5O2S
(14,14-Dimethyl-13-oxa-10-thia-3,5,6,8-tetrazatetracyclo[7.7.0.02,6.011,16]hexadeca-1(9),2,4,7,11(16)-pentaen-4-yl)-piperidin-1-ylmethanone
—— 2-(5,7-dimethyl-2-methylsulfanyl-[1,2,4]triazolo[1,5-a]pyrimidin-6-yl)-N-[(1S)-1-(1,5-dimethylpyrazol-4-yl)ethyl]acetamide —— C17H23N7OS
2-(5,7-dimethyl-2-methylsulfanyl-[1,2,4]triazolo[1,5-a]pyrimidin-6-yl)-N-[(1S)-1-(1,5-dimethylpyrazol-4-yl)ethyl]acetamide
—— (14R)-7,14-dimethyl-N-(2-morpholin-4-ium-4-ylethyl)-10-thia-3,5,6,8-tetrazatetracyclo[7.7.0.02,6.011,16]hexadeca-1(9),2,4,7,11(16)-pentaene-4-carboxamide —— C20H27N6O2S+
(14R)-7,14-dimethyl-N-(2-morpholin-4-ium-4-ylethyl)-10-thia-3,5,6,8-tetrazatetracyclo[7.7.0.02,6.011,16]hexadeca-1(9),2,4,7,11(16)-pentaene-4-carboxamide
—— (E)-3-[(13S)-13-methyl-10-thia-3,5,6,8-tetrazatetracyclo[7.7.0.02,6.011,16]hexadeca-1(9),2,4,7,11(16)-pentaen-4-yl]prop-2-enoate —— C15H13N4O2S-
(E)-3-[(13S)-13-methyl-10-thia-3,5,6,8-tetrazatetracyclo[7.7.0.02,6.011,16]hexadeca-1(9),2,4,7,11(16)-pentaen-4-yl]prop-2-enoate
—— (15S)-N-[(2R)-1-hydroxybutan-2-yl]-15-methyl-10-thia-3,5,6,8-tetrazatetracyclo[7.7.0.02,6.011,16]hexadeca-1(9),2,4,7,11(16)-pentaene-4-carboxamide —— C17H21N5O2S
(15S)-N-[(2R)-1-hydroxybutan-2-yl]-15-methyl-10-thia-3,5,6,8-tetrazatetracyclo[7.7.0.02,6.011,16]hexadeca-1(9),2,4,7,11(16)-pentaene-4-carboxamide
—— N-[5-hydroxy-2-(trifluoromethyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-yl]-3-nitrobenzamide —— C13H7F3N6O4
N-[5-hydroxy-2-(trifluoromethyl)[1,2,4]triazolo[1,5-a]pyrimidin-7-yl]-3-nitrobenzamide
—— N-(2,4-difluorophenyl)-5-methyl[1,2,4]triazolo[1,5-a]pyrimidin-7-amine —— C12H9F2N5
N-(2,4-difluorophenyl)-5-methyl[1,2,4]triazolo[1,5-a]pyrimidin-7-amine
—— 2-(5,7-dimethyl-2-methylsulfanyl-[1,2,4]triazolo[1,5-a]pyrimidin-6-yl)-N-[2-(4-methyl-1,3-thiazol-2-yl)ethyl]acetamide —— C16H20N6OS2
2-(5,7-dimethyl-2-methylsulfanyl-[1,2,4]triazolo[1,5-a]pyrimidin-6-yl)-N-[2-(4-methyl-1,3-thiazol-2-yl)ethyl]acetamide
—— 2-(5,7-dimethyl-2-methylsulfanyl-[1,2,4]triazolo[1,5-a]pyrimidin-6-yl)-N-[3-[(3R,5S)-3,5-dimethylpiperidin-1-yl]propyl]acetamide —— C20H32N6OS
2-(5,7-dimethyl-2-methylsulfanyl-[1,2,4]triazolo[1,5-a]pyrimidin-6-yl)-N-[3-[(3R,5S)-3,5-dimethylpiperidin-1-yl]propyl]acetamide
—— 2-(5,7-dimethyl-2-methylsulfanyl-[1,2,4]triazolo[1,5-a]pyrimidin-6-yl)-N-[3-[(3S,5S)-3,5-dimethylpiperidin-1-yl]propyl]acetamide —— C20H32N6OS
2-(5,7-dimethyl-2-methylsulfanyl-[1,2,4]triazolo[1,5-a]pyrimidin-6-yl)-N-[3-[(3S,5S)-3,5-dimethylpiperidin-1-yl]propyl]acetamide
—— 2-(5,7-dimethyl-2-methylsulfanyl-[1,2,4]triazolo[1,5-a]pyrimidin-6-yl)-N-[3-[(3R,5R)-3,5-dimethylpiperidin-1-yl]propyl]acetamide —— C20H32N6OS
2-(5,7-dimethyl-2-methylsulfanyl-[1,2,4]triazolo[1,5-a]pyrimidin-6-yl)-N-[3-[(3R,5R)-3,5-dimethylpiperidin-1-yl]propyl]acetamide
—— 3-(5,7-dimethyl-[1,2,4]triazolo[1,5-a]pyrimidin-6-yl)-N-[(2S)-2-[(3S)-3-methylpiperidin-1-yl]propyl]propanamide —— C19H30N6O
3-(5,7-dimethyl-[1,2,4]triazolo[1,5-a]pyrimidin-6-yl)-N-[(2S)-2-[(3S)-3-methylpiperidin-1-yl]propyl]propanamide
—— Ethyl 12-methyl-5-propyl-10-thia-3,4,6,8-tetrazatricyclo[7.3.0.02,6]dodeca-1(9),2,4,7,11-pentaene-11-carboxylate —— C14H16N4O2S
Ethyl 12-methyl-5-propyl-10-thia-3,4,6,8-tetrazatricyclo[7.3.0.02,6]dodeca-1(9),2,4,7,11-pentaene-11-carboxylate
—— (6S,7R)-7-(3-bromophenyl)-N-(2-methoxyphenyl)-5-methylidene-6,7-dihydro-1H-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxamide —— C20H18BrN5O2
(6S,7R)-7-(3-bromophenyl)-N-(2-methoxyphenyl)-5-methylidene-6,7-dihydro-1H-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxamide