You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 3-methoxy-N-(4-methoxy-7-methyl-1,3-benzothiazol-2-yl)-1-methyl-N-(2-morpholin-4-ylethyl)pyrazole-4-carboxamide by IUPAC nomenclature, provide its molecular formula.
user
C21H27N5O4S
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