Ethyl 5-hydroxy-2-(methylthio)-7-oxo-8-(prop-2-yn-1-yl)-7,8-dihydropyrido[2,3-d]pyrimidine-6-carboxylate 1g

Ethyl 5-hydroxy-2-(methylthio)-7-oxo-8-(prop-2-yn-1-yl)-7,8-dihydropyrido[2,3-d]pyrimidine-6-carboxylate 1g