You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 5-chloro-N-[[3-[4-(4-methyl-3-oxomorpholin-4-ium-4-yl)phenyl]-2-oxo-1,3-oxazolidin-5-yl]methyl]thiophene-2-carboxamide into molecular formula.
user
C20H21ClN3O5S+
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