You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[3-[[(2S)-4-phenylbutan-2-yl]carbamoyl]phenyl]-5-propyl-1,3,4-thiadiazole-2-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C23H26N4O2S
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