You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule N-(2-methylcyclohexyl)-2,2-dioxo-3,4-dihydropyrido[2,1-c][1,2,4]thiadiazine-7-carboxamide into molecular formula.
user
C15H21N3O3S
assistant