You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2,4-dimethyl-6-[5-(4-morpholin-4-ylphenyl)-4,5-dihydro-1H-pyrazol-3-yl]phenol The above is the IUPAC name of a molecule. Write its molecular formula.
user
C21H25N3O2
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