You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(4R)-1-propan-2-yl-4-(3-pyrimidin-2-yloxyphenyl)-2,4,5,7-tetrahydropyrazolo[3,4-b]pyridine-3,6-dione is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H19N5O3
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