4-HYdroxy-3-(4-methoxy-benzyl)-2-oxo-3,5,7,8-tetrahydro-2h-pyrido[4,3-d]pyrimidine-6-carboxylic acid tert-butyl ester 5g

4-HYdroxy-3-(4-methoxy-benzyl)-2-oxo-3,5,7,8-tetrahydro-2h-pyrido[4,3-d]pyrimidine-6-carboxylic acid tert-butyl ester 5g