You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance methyl (16R)-6-methoxy-16-methyl-17-oxa-3-aza-13-azoniapentacyclo[11.8.0.02,10.04,9.015,20]henicosa-2(10),4(9),5,7,18-pentaene-19-carboxylate;molecular hydrogen .
user
C22H33N2O4+
assistant