You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance (3-ethyl-5-methyl-1,2-oxazol-4-yl)-(8-methyl-3-pyridin-4-yl-6,8-dihydro-5H-imidazo[1,5-a]pyrazin-7-yl)methanone .
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C19H21N5O2
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