You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[2-(2,3-dihydro-1-benzofuran-2-yl)-7,8-dihydro-5H-pyrano[4,3-d]pyrimidin-4-yl]hydrazine The above is the IUPAC name of a molecule. Write its molecular formula.
user
C15H16N4O2
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