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-[(2S)-1-[[5-(3-methoxyphenyl)-1,3,4-thiadiazol-2-yl]amino]-1-oxopropan-2-yl]-2-methylbenzamide into molecular formula.
user
C20H20N4O3S
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