You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-[(3-nitro-2-propan-2-yloxyphenyl)methylideneamino]-4-azatricyclo[5.2.1.02,6]dec-8-ene-3,5-dione is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H19N3O5
assistant