You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(Z)-1-[(19R)-1,11-diazapentacyclo[9.6.2.02,7.08,18.015,19]nonadeca-2,4,6,8(18),16-pentaen-17-yl]-N-methoxybutan-1-imine is the IUPAC name of a molecule. Please give its molecular formula.
user
C22H27N3O
assistant