... - 4 - normal propyl - 4, 5 - dihydro - [1,2,4] triazole - [1, 5) and pyrimidine - 5 - ketone for BaiSeJing form solid molecular ... h - [1,2,4] triazolo [1, 5 - a] pyrimidin - 5 - one vomit; Nauseant phosphodiesterase IV inhibitor soluble in dimethylformamide, dichloromethane, methanol slightly ... 4-propyl-4H-[1,2,4] triazolo [1,5-a]pyrimidin-5-one vomit; nauseant phosphodiesterase IV inhibitor 27277-00 ...