You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance (2S)-4-hydroxy-2-phenyl-1-(5-propylsulfanyl-1,3,4-thiadiazol-2-yl)-3-(thiophene-2-carbonyl)-2H-pyrrol-5-one .
user
C20H17N3O3S3
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