You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-[(5R)-5-methyl-3-[6-(1-methylpyrazol-4-yl)pyridin-3-yl]oxy-4H-1,2-oxazol-5-yl]phenol The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H18N4O3
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