You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 1-methyl-N-(5-methyl-1,2-oxazol-3-yl)-5-[4-methyl-5-(pyrrolidine-1-carbonyl)-1,3-thiazol-2-yl]pyrrole-3-sulfonamide into its molecular formula.
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C18H21N5O4S2
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