You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named [1-(2-hydroxyethyl)-4,6-dihydropyrrolo[3,4-c]pyrazol-5-yl]-[5-(3-methoxyphenyl)-1H-pyrazol-4-yl]methanone by IUPAC nomenclature, provide its molecular formula.
user
C18H19N5O3
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