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中文名称 英文名称 CAS号 化学式 结构式图片
—— prop-2-enyl (7R)-5-methyl-7-(4-pentoxyphenyl)-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate —— C24H32N4O3S
prop-2-enyl (7R)-5-methyl-7-(4-pentoxyphenyl)-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate
—— prop-2-enyl (7S)-7-[4-[(4-chlorophenyl)methoxy]phenyl]-5-methyl-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate —— C26H27ClN4O3S
prop-2-enyl (7S)-7-[4-[(4-chlorophenyl)methoxy]phenyl]-5-methyl-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate
—— prop-2-enyl (7R)-7-[2-[(4-chlorophenyl)methoxy]phenyl]-5-methyl-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate —— C26H27ClN4O3S
prop-2-enyl (7R)-7-[2-[(4-chlorophenyl)methoxy]phenyl]-5-methyl-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate
—— prop-2-enyl (7R)-7-(3-butoxyphenyl)-5-methyl-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate —— C23H30N4O3S
prop-2-enyl (7R)-7-(3-butoxyphenyl)-5-methyl-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate
—— prop-2-enyl (7S)-7-[2-[(2-chlorophenyl)methoxy]phenyl]-5-methyl-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate —— C26H27ClN4O3S
prop-2-enyl (7S)-7-[2-[(2-chlorophenyl)methoxy]phenyl]-5-methyl-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate
—— prop-2-enyl (7R)-7-(3-methoxy-4-propan-2-yloxyphenyl)-5-methyl-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate —— C23H30N4O4S
prop-2-enyl (7R)-7-(3-methoxy-4-propan-2-yloxyphenyl)-5-methyl-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate
—— prop-2-enyl (7R)-5-methyl-7-[2-[(2-methylphenyl)methoxy]phenyl]-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate —— C27H30N4O3S
prop-2-enyl (7R)-5-methyl-7-[2-[(2-methylphenyl)methoxy]phenyl]-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate
—— prop-2-enyl (7R)-7-(4-ethoxy-3-methoxyphenyl)-5-methyl-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate —— C22H28N4O4S
prop-2-enyl (7R)-7-(4-ethoxy-3-methoxyphenyl)-5-methyl-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate
—— prop-2-enyl (7R)-7-(3-ethoxy-4-propoxyphenyl)-5-methyl-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate —— C24H32N4O4S
prop-2-enyl (7R)-7-(3-ethoxy-4-propoxyphenyl)-5-methyl-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate
—— prop-2-enyl (7R)-7-(3-methoxy-4-propoxyphenyl)-5-methyl-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate —— C23H30N4O4S
prop-2-enyl (7R)-7-(3-methoxy-4-propoxyphenyl)-5-methyl-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate
—— prop-2-enyl (7S)-7-[3-methoxy-4-[(4-methylphenyl)methoxy]phenyl]-5-methyl-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate —— C28H32N4O4S
prop-2-enyl (7S)-7-[3-methoxy-4-[(4-methylphenyl)methoxy]phenyl]-5-methyl-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate
—— prop-2-enyl (7R)-7-(3-bromo-5-ethoxy-4-methoxyphenyl)-5-methyl-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate —— C22H27BrN4O4S
prop-2-enyl (7R)-7-(3-bromo-5-ethoxy-4-methoxyphenyl)-5-methyl-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate
—— prop-2-enyl (7R)-7-(3-bromo-4-ethoxy-5-methoxyphenyl)-5-methyl-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate —— C22H27BrN4O4S
prop-2-enyl (7R)-7-(3-bromo-4-ethoxy-5-methoxyphenyl)-5-methyl-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate
—— prop-2-enyl (7S)-7-[3-[(4-chlorophenyl)methoxy]phenyl]-5-methyl-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate —— C26H27ClN4O3S
prop-2-enyl (7S)-7-[3-[(4-chlorophenyl)methoxy]phenyl]-5-methyl-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate
—— prop-2-enyl (7S)-7-(4-hexoxy-3-methoxyphenyl)-5-methyl-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate —— C26H36N4O4S
prop-2-enyl (7S)-7-(4-hexoxy-3-methoxyphenyl)-5-methyl-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate
—— prop-2-enyl (7R)-5-methyl-7-(2-propoxyphenyl)-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate —— C22H28N4O3S
prop-2-enyl (7R)-5-methyl-7-(2-propoxyphenyl)-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate
—— prop-2-enyl (7R)-7-(3-methoxy-4-pentoxyphenyl)-5-methyl-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate —— C25H34N4O4S
prop-2-enyl (7R)-7-(3-methoxy-4-pentoxyphenyl)-5-methyl-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate
—— prop-2-enyl (7S)-5-methyl-7-(2-phenylmethoxyphenyl)-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate —— C26H28N4O3S
prop-2-enyl (7S)-5-methyl-7-(2-phenylmethoxyphenyl)-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate
—— prop-2-enyl (7S)-5-methyl-7-[2-[(4-methylphenyl)methoxy]phenyl]-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate —— C27H30N4O3S
prop-2-enyl (7S)-5-methyl-7-[2-[(4-methylphenyl)methoxy]phenyl]-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate
—— prop-2-enyl (7S)-5-methyl-7-[2-[(2-methylphenyl)methoxy]phenyl]-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate —— C27H30N4O3S
prop-2-enyl (7S)-5-methyl-7-[2-[(2-methylphenyl)methoxy]phenyl]-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate
—— prop-2-enyl (7R)-5-methyl-7-[4-(2-morpholin-4-yl-2-oxoethoxy)phenyl]-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate —— C25H31N5O5S
prop-2-enyl (7R)-5-methyl-7-[4-(2-morpholin-4-yl-2-oxoethoxy)phenyl]-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate
—— prop-2-enyl (7S)-7-(5-bromo-2-propoxyphenyl)-5-methyl-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate —— C22H27BrN4O3S
prop-2-enyl (7S)-7-(5-bromo-2-propoxyphenyl)-5-methyl-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate
—— prop-2-enyl (7R)-7-(2-ethoxy-3-methoxyphenyl)-5-methyl-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate —— C22H28N4O4S
prop-2-enyl (7R)-7-(2-ethoxy-3-methoxyphenyl)-5-methyl-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate
—— prop-2-enyl (7R)-5-methyl-7-(4-propan-2-yloxyphenyl)-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate —— C22H28N4O3S
prop-2-enyl (7R)-5-methyl-7-(4-propan-2-yloxyphenyl)-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate
—— prop-2-enyl (7S)-7-(4-hexoxyphenyl)-5-methyl-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate —— C25H34N4O3S
prop-2-enyl (7S)-7-(4-hexoxyphenyl)-5-methyl-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate
—— prop-2-enyl (7S)-7-[4-[(2-fluorophenyl)methoxy]phenyl]-5-methyl-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate —— C26H27FN4O3S
prop-2-enyl (7S)-7-[4-[(2-fluorophenyl)methoxy]phenyl]-5-methyl-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate
—— prop-2-enyl (7R)-7-[3-methoxy-4-(3-methylbutoxy)phenyl]-5-methyl-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate —— C25H34N4O4S
prop-2-enyl (7R)-7-[3-methoxy-4-(3-methylbutoxy)phenyl]-5-methyl-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate
—— prop-2-enyl (7R)-7-(3-bromo-4,5-dimethoxyphenyl)-5-methyl-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate —— C21H25BrN4O4S
prop-2-enyl (7R)-7-(3-bromo-4,5-dimethoxyphenyl)-5-methyl-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate
—— prop-2-enyl (7R)-7-(5-bromo-2-ethoxyphenyl)-5-methyl-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate —— C21H25BrN4O3S
prop-2-enyl (7R)-7-(5-bromo-2-ethoxyphenyl)-5-methyl-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate
—— prop-2-enyl (7R)-5-methyl-7-[4-(2-phenylethoxy)phenyl]-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate —— C27H30N4O3S
prop-2-enyl (7R)-5-methyl-7-[4-(2-phenylethoxy)phenyl]-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate
—— prop-2-enyl (7S)-7-[3-methoxy-4-[(3-methylphenyl)methoxy]phenyl]-5-methyl-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate —— C28H32N4O4S
prop-2-enyl (7S)-7-[3-methoxy-4-[(3-methylphenyl)methoxy]phenyl]-5-methyl-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate
—— prop-2-enyl (7S)-7-(3-methoxyphenyl)-5-methyl-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate —— C20H24N4O3S
prop-2-enyl (7S)-7-(3-methoxyphenyl)-5-methyl-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate
—— prop-2-enyl (7R)-5-methyl-7-(3-phenylmethoxyphenyl)-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate —— C26H28N4O3S
prop-2-enyl (7R)-5-methyl-7-(3-phenylmethoxyphenyl)-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate
—— prop-2-enyl (7S)-5-methyl-7-[3-[(2-methylphenyl)methoxy]phenyl]-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate —— C27H30N4O3S
prop-2-enyl (7S)-5-methyl-7-[3-[(2-methylphenyl)methoxy]phenyl]-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate
—— prop-2-enyl (7S)-5-methyl-7-(4-phenylmethoxyphenyl)-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate —— C26H28N4O3S
prop-2-enyl (7S)-5-methyl-7-(4-phenylmethoxyphenyl)-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate
—— prop-2-enyl (7S)-7-(4-ethoxyphenyl)-5-methyl-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate —— C21H26N4O3S
prop-2-enyl (7S)-7-(4-ethoxyphenyl)-5-methyl-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate
—— prop-2-enyl (7S)-5-methyl-7-(4-pentoxyphenyl)-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate —— C24H32N4O3S
prop-2-enyl (7S)-5-methyl-7-(4-pentoxyphenyl)-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate
—— prop-2-enyl (7S)-7-(3-ethoxy-4-phenylmethoxyphenyl)-5-methyl-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate —— C28H32N4O4S
prop-2-enyl (7S)-7-(3-ethoxy-4-phenylmethoxyphenyl)-5-methyl-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate
—— prop-2-enyl (7R)-5-methyl-2-propylsulfanyl-7-[4-[(2,4,5-trimethylphenyl)methoxy]phenyl]-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate —— C29H34N4O3S
prop-2-enyl (7R)-5-methyl-2-propylsulfanyl-7-[4-[(2,4,5-trimethylphenyl)methoxy]phenyl]-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate
—— prop-2-enyl (7R)-7-[3-methoxy-4-[(2-methylphenyl)methoxy]phenyl]-5-methyl-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate —— C28H32N4O4S
prop-2-enyl (7R)-7-[3-methoxy-4-[(2-methylphenyl)methoxy]phenyl]-5-methyl-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate
—— prop-2-enyl (7R)-7-[3-[(4-chlorophenyl)methoxy]phenyl]-5-methyl-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate —— C26H27ClN4O3S
prop-2-enyl (7R)-7-[3-[(4-chlorophenyl)methoxy]phenyl]-5-methyl-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate
—— prop-2-enyl (7R)-7-[3-[(2-chlorophenyl)methoxy]phenyl]-5-methyl-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate —— C26H27ClN4O3S
prop-2-enyl (7R)-7-[3-[(2-chlorophenyl)methoxy]phenyl]-5-methyl-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate
—— prop-2-enyl (7S)-7-(3-ethoxy-4-propoxyphenyl)-5-methyl-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate —— C24H32N4O4S
prop-2-enyl (7S)-7-(3-ethoxy-4-propoxyphenyl)-5-methyl-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate
—— prop-2-enyl (7R)-7-(4-chlorophenyl)-5-methyl-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate —— C19H21ClN4O2S
prop-2-enyl (7R)-7-(4-chlorophenyl)-5-methyl-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate
—— prop-2-enyl (7R)-7-(3-methoxy-4-phenylmethoxyphenyl)-5-methyl-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate —— C27H30N4O4S
prop-2-enyl (7R)-7-(3-methoxy-4-phenylmethoxyphenyl)-5-methyl-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate
—— prop-2-enyl (7R)-7-(4-methoxyphenyl)-5-methyl-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate —— C20H24N4O3S
prop-2-enyl (7R)-7-(4-methoxyphenyl)-5-methyl-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate
—— propyl (7R)-7-(3-chlorophenyl)-5-methyl-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate —— C19H23ClN4O2S
propyl (7R)-7-(3-chlorophenyl)-5-methyl-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate
—— propyl (7S)-7-(3-chlorophenyl)-5-methyl-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate —— C19H23ClN4O2S
propyl (7S)-7-(3-chlorophenyl)-5-methyl-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate
—— propan-2-yl (7R)-7-[4-[2-(diethylamino)-2-oxoethoxy]-3-methoxyphenyl]-5-methyl-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate —— C26H37N5O5S
propan-2-yl (7R)-7-[4-[2-(diethylamino)-2-oxoethoxy]-3-methoxyphenyl]-5-methyl-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate
—— propan-2-yl (7R)-7-(5-bromo-2-ethoxyphenyl)-5-methyl-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate —— C21H27BrN4O3S
propan-2-yl (7R)-7-(5-bromo-2-ethoxyphenyl)-5-methyl-2-propylsulfanyl-1,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate