You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named (1R,9S)-11-[(2R)-2-hydroxy-3-(4-methoxyanilino)propyl]-7,11-diazatricyclo[7.3.1.02,7]trideca-2,4-dien-6-one is given. What is its corresponding molecular formula?
user
C21H27N3O3
assistant