122113-43-3 6H-Pyrrolo(2,3-d)pyrimidin-6-one, 5,7-dihydro-7-methyl-2-(1-pyrrolidinyl)-, (E)-2-butenedioate (1:2) 7-Methyl-2-pyrrolidino-5,7-dihydro-6H-pyrrolo(2,3-d)pyrimidin-6-one fumarate (1:2)