You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 2-methyl-5-(morpholine-4-carbonyl)-N-[(1S)-1-(4-propan-2-ylphenyl)ethyl]pyrazole-3-carboxamide by IUPAC nomenclature, provide its molecular formula.
user
C21H28N4O3
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