You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule N-[(2R)-3-(3-cyanophenyl)-1-(4-methylpiperazin-1-yl)-1-oxopropan-2-yl]naphthalene-2-sulfonamide into molecular formula.
user
C25H26N4O3S
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