You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(4R)-5-benzoyl-10,11-dimethoxyspiro[5-azatricyclo[6.3.1.04,12]dodeca-1(12),8,10-triene-2,4'-cyclohexa-2,5-diene]-1'-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C25H23NO4
assistant