You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 2-methyl-6-(6-propan-2-yloxypyrazin-2-yl)-7,8-dihydro-5H-pyrido[4,3-c]pyridazin-3-one into its molecular formula.
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C15H19N5O2
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