You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule N-(3-carbamoyl-5-methyl-4-phenylthiophen-2-yl)-2,2-dioxo-3,4-dihydropyrido[2,1-c][1,2,4]thiadiazine-9-carboxamide ?
user
C20H18N4O4S2
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