You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-propyl-N-[(2S)-1,2,3,4-tetrahydronaphthalen-2-yl]-1,2,4-benzotriazine-3-carboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C21H22N4O
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