You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
tert-butyl N-[1-(3,4-dihydro-2H-1,5-benzodioxepin-7-ylmethylamino)butan-2-yl]carbamate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H30N2O4
assistant