You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
tert-butyl N-[3-[2-[(2-methyl-2H-chromen-3-yl)methylidene]hydrazinyl]-3-oxopropyl]carbamate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H25N3O4
assistant