You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
5-[1-(2-methoxyethyl)pyrazol-3-yl]-4-methyl-N-[[1-(1,3-thiazol-2-yl)pyrrol-2-yl]methyl]-1,3-thiazol-2-amine is the IUPAC name of a molecule. Please give its molecular formula.
user
C18H20N6OS2
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