You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
18,18-diethyl-11,15-dimethoxy-5-methyl-13-oxa-5,16,20-triazaheptacyclo[13.5.2.12,8.01,6.02,14.016,20.012,23]tricosa-8(23),9,11-triene-17,19-dione The above is the IUPAC name of a molecule. Write its molecular formula.
user
C26H33N3O5
assistant