摩熵化学
数据库官网
小程序
打开微信扫一扫
首页 分子通 化学资讯 化学百科 反应查询 关于我们
请输入关键词

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-[(1S,2S,3S)-2,3-dimethylcyclohexyl]-2-[[5,7-dimethyl-6-[(2-methylphenyl)methyl]-[1,2,4]triazolo[1,5-a]pyrimidin-2-yl]sulfanyl]acetamide —— C25H33N5OS
N-[(1S,2S,3S)-2,3-dimethylcyclohexyl]-2-[[5,7-dimethyl-6-[(2-methylphenyl)methyl]-[1,2,4]triazolo[1,5-a]pyrimidin-2-yl]sulfanyl]acetamide
—— 2-[[6-[(2-chlorophenyl)methyl]-5,7-dimethyl-[1,2,4]triazolo[1,5-a]pyrimidin-2-yl]sulfanyl]-N-[(1S,2S,3S)-2,3-dimethylcyclohexyl]acetamide —— C24H30ClN5OS
2-[[6-[(2-chlorophenyl)methyl]-5,7-dimethyl-[1,2,4]triazolo[1,5-a]pyrimidin-2-yl]sulfanyl]-N-[(1S,2S,3S)-2,3-dimethylcyclohexyl]acetamide
—— N-[(2S)-3-(diethylamino)-2-methylpropyl]-2-[[5,7-dimethyl-6-[(2-methylphenyl)methyl]-[1,2,4]triazolo[1,5-a]pyrimidin-2-yl]sulfanyl]acetamide —— C25H36N6OS
N-[(2S)-3-(diethylamino)-2-methylpropyl]-2-[[5,7-dimethyl-6-[(2-methylphenyl)methyl]-[1,2,4]triazolo[1,5-a]pyrimidin-2-yl]sulfanyl]acetamide
—— 2-[[6-[(2-chloro-6-fluorophenyl)methyl]-5,7-dimethyl-[1,2,4]triazolo[1,5-a]pyrimidin-2-yl]sulfanyl]-N-[(1R,2S,3R)-2,3-dimethylcyclohexyl]acetamide —— C24H29ClFN5OS
2-[[6-[(2-chloro-6-fluorophenyl)methyl]-5,7-dimethyl-[1,2,4]triazolo[1,5-a]pyrimidin-2-yl]sulfanyl]-N-[(1R,2S,3R)-2,3-dimethylcyclohexyl]acetamide
—— N-[(1R,2S,3R)-2,3-dimethylcyclohexyl]-2-[[5,7-dimethyl-6-[(2-methylphenyl)methyl]-[1,2,4]triazolo[1,5-a]pyrimidin-2-yl]sulfanyl]acetamide —— C25H33N5OS
N-[(1R,2S,3R)-2,3-dimethylcyclohexyl]-2-[[5,7-dimethyl-6-[(2-methylphenyl)methyl]-[1,2,4]triazolo[1,5-a]pyrimidin-2-yl]sulfanyl]acetamide
—— 2-[[5,7-dimethyl-6-[(2-methylphenyl)methyl]-[1,2,4]triazolo[1,5-a]pyrimidin-2-yl]sulfanyl]-N-[(1R,2R)-2-methylcyclohexyl]acetamide —— C24H31N5OS
2-[[5,7-dimethyl-6-[(2-methylphenyl)methyl]-[1,2,4]triazolo[1,5-a]pyrimidin-2-yl]sulfanyl]-N-[(1R,2R)-2-methylcyclohexyl]acetamide
—— 2-[[6-[(2-chlorophenyl)methyl]-5,7-dimethyl-[1,2,4]triazolo[1,5-a]pyrimidin-2-yl]sulfanyl]-N-[(1S,2R)-2-methylcyclohexyl]acetamide —— C23H28ClN5OS
2-[[6-[(2-chlorophenyl)methyl]-5,7-dimethyl-[1,2,4]triazolo[1,5-a]pyrimidin-2-yl]sulfanyl]-N-[(1S,2R)-2-methylcyclohexyl]acetamide
—— 2-[[5,7-dimethyl-6-[(4-methylphenyl)methyl]-[1,2,4]triazolo[1,5-a]pyrimidin-2-yl]sulfanyl]-N-[(1R,2S)-2-methylcyclohexyl]acetamide —— C24H31N5OS
2-[[5,7-dimethyl-6-[(4-methylphenyl)methyl]-[1,2,4]triazolo[1,5-a]pyrimidin-2-yl]sulfanyl]-N-[(1R,2S)-2-methylcyclohexyl]acetamide
—— Allyl 8,9-dimethylthieno[3,2-e][1,2,4]triazolo[4,3-c]pyrimidin-3-yl sulfide —— C12H12N4S2
Allyl 8,9-dimethylthieno[3,2-e][1,2,4]triazolo[4,3-c]pyrimidin-3-yl sulfide
—— 2-(5-Bromopyridin-3-yl)-1-[2-[(5-methyl-2-methylsulfanyl-[1,2,4]triazolo[1,5-a]pyrimidin-7-yl)oxymethyl]morpholin-4-yl]ethanone —— C19H21BrN6O3S
2-(5-Bromopyridin-3-yl)-1-[2-[(5-methyl-2-methylsulfanyl-[1,2,4]triazolo[1,5-a]pyrimidin-7-yl)oxymethyl]morpholin-4-yl]ethanone
—— (7R)-2-[(2-chlorophenyl)methylsulfanyl]-7-(3-hydroxyphenyl)-5-methyl-N-pyridin-3-yl-4,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxamide —— C25H21ClN6O2S
(7R)-2-[(2-chlorophenyl)methylsulfanyl]-7-(3-hydroxyphenyl)-5-methyl-N-pyridin-3-yl-4,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxamide
—— (7S)-2-benzylsulfanyl-7-(2-chlorophenyl)-5-methyl-N-pyridin-3-yl-4,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxamide —— C25H21ClN6OS
(7S)-2-benzylsulfanyl-7-(2-chlorophenyl)-5-methyl-N-pyridin-3-yl-4,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxamide
—— (7R)-2-benzylsulfanyl-7-(2-chlorophenyl)-5-methyl-N-pyridin-3-yl-4,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxamide —— C25H21ClN6OS
(7R)-2-benzylsulfanyl-7-(2-chlorophenyl)-5-methyl-N-pyridin-3-yl-4,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxamide
—— (7R)-2-[(2-chlorophenyl)methylsulfanyl]-7-(4-fluorophenyl)-5-methyl-N-pyridin-3-yl-4,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxamide —— C25H20ClFN6OS
(7R)-2-[(2-chlorophenyl)methylsulfanyl]-7-(4-fluorophenyl)-5-methyl-N-pyridin-3-yl-4,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxamide
—— (7S)-2-[(2-chlorophenyl)methylsulfanyl]-7-(3-hydroxyphenyl)-5-methyl-N-pyridin-3-yl-4,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxamide —— C25H21ClN6O2S
(7S)-2-[(2-chlorophenyl)methylsulfanyl]-7-(3-hydroxyphenyl)-5-methyl-N-pyridin-3-yl-4,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxamide
—— 2-[(11,12-Dimethyl-10-thia-3,4,6,8-tetrazatricyclo[7.3.0.02,6]dodeca-1(9),2,4,7,11-pentaen-5-yl)sulfanyl]-1-(2-methylpiperidin-1-yl)ethanone —— C17H21N5OS2
2-[(11,12-Dimethyl-10-thia-3,4,6,8-tetrazatricyclo[7.3.0.02,6]dodeca-1(9),2,4,7,11-pentaen-5-yl)sulfanyl]-1-(2-methylpiperidin-1-yl)ethanone
—— 1-(ethylsulfanyl)-6-methyl-4-(4-methylphenyl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-e][1,2,4]triazolo[4,3-a]pyrimidin-5(4H)-one —— C21H22N4OS2
1-(ethylsulfanyl)-6-methyl-4-(4-methylphenyl)-6,7,8,9-tetrahydro[1]benzothieno[3,2-e][1,2,4]triazolo[4,3-a]pyrimidin-5(4H)-one
—— 7-[(2,4-dichlorobenzyl)sulfanyl]-12,12-dimethyl-12,13-dihydro-10H-pyrano[4',3':4,5]thieno[3,2-e]bis[1,2,4]triazolo[4,3-a:1',5'-c]pyrimidine —— C20H16Cl2N6OS2
7-[(2,4-dichlorobenzyl)sulfanyl]-12,12-dimethyl-12,13-dihydro-10H-pyrano[4',3':4,5]thieno[3,2-e]bis[1,2,4]triazolo[4,3-a:1',5'-c]pyrimidine
—— (7R)-N-(2-methoxyphenyl)-5-methyl-7-(5-methylfuran-2-yl)-2-phenyl-4,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxamide —— C25H23N5O3
(7R)-N-(2-methoxyphenyl)-5-methyl-7-(5-methylfuran-2-yl)-2-phenyl-4,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxamide
—— 7-(4-fluorophenyl)-5-(3-methoxyphenyl)-1,5,6,7-tetrahydro-[1,2,4]triazolo[1,5-a]pyrimidine —— C18H17FN4O
7-(4-fluorophenyl)-5-(3-methoxyphenyl)-1,5,6,7-tetrahydro-[1,2,4]triazolo[1,5-a]pyrimidine
—— (7R)-7-(2-chlorophenyl)-N-(2-methoxyphenyl)-5-methyl-2-pyridin-3-yl-4,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxamide —— C25H21ClN6O2
(7R)-7-(2-chlorophenyl)-N-(2-methoxyphenyl)-5-methyl-2-pyridin-3-yl-4,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxamide
—— (7S)-N-(2-methoxyphenyl)-5-methyl-7-(5-methylfuran-2-yl)-2-phenyl-4,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxamide —— C25H23N5O3
(7S)-N-(2-methoxyphenyl)-5-methyl-7-(5-methylfuran-2-yl)-2-phenyl-4,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxamide
—— 1-[2-[(5-Methyl-2-methylsulfanyl-[1,2,4]triazolo[1,5-a]pyrimidin-7-yl)oxymethyl]morpholin-4-yl]-5-thiophen-2-ylpentan-1-one —— C21H27N5O3S2
1-[2-[(5-Methyl-2-methylsulfanyl-[1,2,4]triazolo[1,5-a]pyrimidin-7-yl)oxymethyl]morpholin-4-yl]-5-thiophen-2-ylpentan-1-one
—— 7-(2,6-dichlorophenyl)-5-phenyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine —— C17H12Cl2N4
7-(2,6-dichlorophenyl)-5-phenyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine
—— [2,5-Dimethyl-1-(thiophen-2-ylmethyl)pyrrol-3-yl]-[2-[(5-methyl-2-methylsulfanyl-[1,2,4]triazolo[1,5-a]pyrimidin-7-yl)oxymethyl]morpholin-4-yl]methanone —— C24H28N6O3S2
[2,5-Dimethyl-1-(thiophen-2-ylmethyl)pyrrol-3-yl]-[2-[(5-methyl-2-methylsulfanyl-[1,2,4]triazolo[1,5-a]pyrimidin-7-yl)oxymethyl]morpholin-4-yl]methanone
—— 2-[(12,12-dimethyl-12,13-dihydro-10H-pyrano[4',3':4,5]thieno[3,2-e]bis[1,2,4]triazolo[4,3-a:1',5'-c]pyrimidin-7-yl)sulfanyl]-N-phenylacetamide —— C21H19N7O2S2
2-[(12,12-dimethyl-12,13-dihydro-10H-pyrano[4',3':4,5]thieno[3,2-e]bis[1,2,4]triazolo[4,3-a:1',5'-c]pyrimidin-7-yl)sulfanyl]-N-phenylacetamide
—— 2-{[10-ethyl-10-methyl-5-(methylsulfanyl)-10,11-dihydro-8H-pyrano[4',3':4,5]thieno[3,2-e][1,2,4]triazolo[4,3-c]pyrimidin-3-yl]sulfanyl}-N-(4-methylphenyl)acetamide —— C23H25N5O2S3
2-{[10-ethyl-10-methyl-5-(methylsulfanyl)-10,11-dihydro-8H-pyrano[4',3':4,5]thieno[3,2-e][1,2,4]triazolo[4,3-c]pyrimidin-3-yl]sulfanyl}-N-(4-methylphenyl)acetamide
—— 2-[(1,3-Benzoxazol-2-ylsulfanyl)methyl]-9-(propan-2-yl)-8,9,10,11-tetrahydropyrido[4',3':4,5]thieno[3,2-e][1,2,4]triazolo[1,5-c]pyrimidine —— C21H20N6OS2
2-[(1,3-Benzoxazol-2-ylsulfanyl)methyl]-9-(propan-2-yl)-8,9,10,11-tetrahydropyrido[4',3':4,5]thieno[3,2-e][1,2,4]triazolo[1,5-c]pyrimidine
—— ethyl (7S)-7-(3-bromophenyl)-5-methyl-2-(pyridin-3-ylmethylsulfanyl)-4,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate —— C21H20BrN5O2S
ethyl (7S)-7-(3-bromophenyl)-5-methyl-2-(pyridin-3-ylmethylsulfanyl)-4,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate
—— ethyl (7R)-7-(3-bromophenyl)-5-methyl-2-(pyridin-3-ylmethylsulfanyl)-4,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate —— C21H20BrN5O2S
ethyl (7R)-7-(3-bromophenyl)-5-methyl-2-(pyridin-3-ylmethylsulfanyl)-4,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate
—— (7S)-2-[(2-chlorophenyl)methylsulfanyl]-7-(4-hydroxyphenyl)-5-methyl-N-pyridin-3-yl-4,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxamide —— C25H21ClN6O2S
(7S)-2-[(2-chlorophenyl)methylsulfanyl]-7-(4-hydroxyphenyl)-5-methyl-N-pyridin-3-yl-4,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxamide
—— 2-[[5,7-dimethyl-6-[(2-methylphenyl)methyl]-[1,2,4]triazolo[1,5-a]pyrimidin-2-yl]sulfanyl]-1-[(2S)-2-ethylpiperidin-1-yl]ethanone —— C24H31N5OS
2-[[5,7-dimethyl-6-[(2-methylphenyl)methyl]-[1,2,4]triazolo[1,5-a]pyrimidin-2-yl]sulfanyl]-1-[(2S)-2-ethylpiperidin-1-yl]ethanone
—— 2-[[6-[(2-chlorophenyl)methyl]-5,7-dimethyl-[1,2,4]triazolo[1,5-a]pyrimidin-2-yl]sulfanyl]-1-[(2R)-2-ethylpiperidin-1-yl]ethanone —— C23H28ClN5OS
2-[[6-[(2-chlorophenyl)methyl]-5,7-dimethyl-[1,2,4]triazolo[1,5-a]pyrimidin-2-yl]sulfanyl]-1-[(2R)-2-ethylpiperidin-1-yl]ethanone
—— 2-[[6-[(4-chlorophenyl)methyl]-5,7-dimethyl-[1,2,4]triazolo[1,5-a]pyrimidin-2-yl]sulfanyl]-1-[(2S)-2-ethylpiperidin-1-yl]ethanone —— C23H28ClN5OS
2-[[6-[(4-chlorophenyl)methyl]-5,7-dimethyl-[1,2,4]triazolo[1,5-a]pyrimidin-2-yl]sulfanyl]-1-[(2S)-2-ethylpiperidin-1-yl]ethanone
—— 2-[[6-[(2-chlorophenyl)methyl]-5,7-dimethyl-[1,2,4]triazolo[1,5-a]pyrimidin-2-yl]sulfanyl]-1-[(2S)-2-ethylpiperidin-1-yl]ethanone —— C23H28ClN5OS
2-[[6-[(2-chlorophenyl)methyl]-5,7-dimethyl-[1,2,4]triazolo[1,5-a]pyrimidin-2-yl]sulfanyl]-1-[(2S)-2-ethylpiperidin-1-yl]ethanone
—— 2,11-Dimethyl-8,9,10,11-tetrahydro[1]benzothieno[3,2-e][1,2,4]triazolo[1,5-c]pyrimidine —— C13H14N4S
2,11-Dimethyl-8,9,10,11-tetrahydro[1]benzothieno[3,2-e][1,2,4]triazolo[1,5-c]pyrimidine
—— 2-[[5,7-dimethyl-6-[(2-methylphenyl)methyl]-[1,2,4]triazolo[1,5-a]pyrimidin-2-yl]sulfanyl]-1-[(2R)-2-ethylpiperidin-1-yl]ethanone —— C24H31N5OS
2-[[5,7-dimethyl-6-[(2-methylphenyl)methyl]-[1,2,4]triazolo[1,5-a]pyrimidin-2-yl]sulfanyl]-1-[(2R)-2-ethylpiperidin-1-yl]ethanone
—— (7R)-2-[(2-chlorophenyl)methylsulfanyl]-5-methyl-N-phenyl-7-thiophen-2-yl-4,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxamide —— C24H20ClN5OS2
(7R)-2-[(2-chlorophenyl)methylsulfanyl]-5-methyl-N-phenyl-7-thiophen-2-yl-4,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxamide
—— 2-[[5,7-dimethyl-6-[(3-methylphenyl)methyl]-[1,2,4]triazolo[1,5-a]pyrimidin-2-yl]sulfanyl]-1-[(3R,5S)-3,5-dimethylpiperidin-1-yl]ethanone —— C24H31N5OS
2-[[5,7-dimethyl-6-[(3-methylphenyl)methyl]-[1,2,4]triazolo[1,5-a]pyrimidin-2-yl]sulfanyl]-1-[(3R,5S)-3,5-dimethylpiperidin-1-yl]ethanone
—— 2-[[6-[(2-chloro-4-fluorophenyl)methyl]-5,7-dimethyl-[1,2,4]triazolo[1,5-a]pyrimidin-2-yl]sulfanyl]-1-[(2R)-2-ethylpiperidin-1-yl]ethanone —— C23H27ClFN5OS
2-[[6-[(2-chloro-4-fluorophenyl)methyl]-5,7-dimethyl-[1,2,4]triazolo[1,5-a]pyrimidin-2-yl]sulfanyl]-1-[(2R)-2-ethylpiperidin-1-yl]ethanone
—— 2-[[6-[(4-chlorophenyl)methyl]-5,7-dimethyl-[1,2,4]triazolo[1,5-a]pyrimidin-2-yl]sulfanyl]-1-[(2R)-2-ethylpiperidin-1-yl]ethanone —— C23H28ClN5OS
2-[[6-[(4-chlorophenyl)methyl]-5,7-dimethyl-[1,2,4]triazolo[1,5-a]pyrimidin-2-yl]sulfanyl]-1-[(2R)-2-ethylpiperidin-1-yl]ethanone
—— (7S)-2-[(2-chlorophenyl)methylsulfanyl]-5-methyl-N-phenyl-7-thiophen-2-yl-4,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxamide —— C24H20ClN5OS2
(7S)-2-[(2-chlorophenyl)methylsulfanyl]-5-methyl-N-phenyl-7-thiophen-2-yl-4,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxamide
—— (7R)-2-[(2-chlorophenyl)methylsulfanyl]-7-(4-hydroxyphenyl)-5-methyl-N-pyridin-3-yl-4,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxamide —— C25H21ClN6O2S
(7R)-2-[(2-chlorophenyl)methylsulfanyl]-7-(4-hydroxyphenyl)-5-methyl-N-pyridin-3-yl-4,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxamide
—— 1-[(2-hydroxypropyl)sulfanyl]-4-(4-methoxyphenyl)-8-methyl-6,7,8,9-tetrahydro[1]benzothieno[3,2-e][1,2,4]triazolo[4,3-a]pyrimidin-5(4H)-one —— C22H24N4O3S2
1-[(2-hydroxypropyl)sulfanyl]-4-(4-methoxyphenyl)-8-methyl-6,7,8,9-tetrahydro[1]benzothieno[3,2-e][1,2,4]triazolo[4,3-a]pyrimidin-5(4H)-one
—— N-[5-(4-chlorophenyl)-7-(4-methoxyphenyl)-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidin-2-yl]-2-methoxybenzamide —— C26H22ClN5O3
N-[5-(4-chlorophenyl)-7-(4-methoxyphenyl)-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidin-2-yl]-2-methoxybenzamide
—— (7R)-7-(4-fluorophenyl)-N-(2-methoxyphenyl)-5-methyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxamide —— C20H18FN5O2
(7R)-7-(4-fluorophenyl)-N-(2-methoxyphenyl)-5-methyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxamide
—— N-[5-(4-chlorophenyl)-7-(4-methoxyphenyl)-1,5,6,7-tetrahydro-[1,2,4]triazolo[1,5-a]pyrimidin-2-yl]-3-phenylpropanamide —— C27H26ClN5O2
N-[5-(4-chlorophenyl)-7-(4-methoxyphenyl)-1,5,6,7-tetrahydro-[1,2,4]triazolo[1,5-a]pyrimidin-2-yl]-3-phenylpropanamide
—— 4-[3-(2-Chlorobenzyl)-3H-[1,2,3]triazolo[4,5-D]pyrimidin-7-YL]morpholine —— C15H15ClN6O
4-[3-(2-Chlorobenzyl)-3H-[1,2,3]triazolo[4,5-D]pyrimidin-7-YL]morpholine
—— (7S)-7-[4-[(2-chlorophenyl)methoxy]phenyl]-5-methyl-N-phenyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxamide —— C26H22ClN5O2
(7S)-7-[4-[(2-chlorophenyl)methoxy]phenyl]-5-methyl-N-phenyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxamide
—— 8-Bromo-[1,2,4]triazolo[1,5-c]pyrimidine-5,7-diamine —— C5H5BrN6
8-Bromo-[1,2,4]triazolo[1,5-c]pyrimidine-5,7-diamine