2-(Carboxymethyl)-6-(methylthio)-4-oxo-3,4-dihydro-7H-pyrrolo[2,3-d]pyrimidine-5-carboxamide C??? ??, ??, ??

2-(Carboxymethyl)-6-(methylthio)-4-oxo-3,4-dihydro-7H-pyrrolo[2,3-d]pyrimidine-5-carboxamide ?? ?? ? ???

???

?? ??

2-(Carboxymethyl)-6-(methylthio)-4-oxo-3,4-dihydro-7H-pyrrolo[2,3-d]pyrimidine-5-carboxamide ?? ??