You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
methyl (1R,4Z,5S,7S)-7-(6,7-dimethoxyquinolin-4-yl)-4-ethylidene-7-hydroxy-2-azabicyclo[3.2.1]octane-6-carboxylate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H26N2O5
assistant