You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[(2-methylphenyl)methyl]-2,2-dioxo-N-(pyridin-3-ylmethyl)-3,4-dihydropyrido[2,1-c][1,2,4]thiadiazine-7-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C22H22N4O3S
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