Form
Powder
Appearance
Yellowish-white,odorless,bitter-tastingcrystals
Source
Synthetic
ImpurityProfile
ImpurityA|8-ethyl-2-hydroxy-5-oxo-5,8-dihydropyrido[2,3-d]pyrimidine-6-carboxylicacid||||ImpurityB|8-ethyl-2-methoxy-5-oxo-5,8-dihydropyrido[2,3-d]pyrimidine-6-carboxylicacid||||ImpurityC|2-ethoxy-8-ethyl-5-oxo-5,8-dihydropyrido[2,3-d]pyrimidine-6-carboxylicacid||||ImpurityD|ethyl2-chloro-8-ethyl-5-oxo-5,8-dihydropyrido[2,3-d]pyrimidine-6-carboxylate||||ImpurityE|ethyl8-ethyl-5-oxo-2-(piperazin-1-yl)-5,8-dihydropyrido[2,3-d]pyrimidine-6-carboxylate||||ImpurityF|2-(4-acetylpiperazin-1-yl)-8-ethyl-5-oxo-5,8-dihydropyrido[2,3-d]pyrimidine-6-carboxylicacid(acetylpipemidicacid)||||
MeltingPoint
251-255°C
