You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name N-[(6-methoxy-1,2,3,4-tetrahydronaphthalen-1-yl)methyl]-2-methyl-3-oxo-1,4-diazepane-1-carboxamide into its molecular formula.
user
C19H27N3O3
assistant