You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule (1R,10R,11S)-N-ethyl-2,2-dimethyl-18-oxa-9-azapentacyclo[9.7.1.01,9.03,8.012,17]nonadeca-3,5,7,12,14,16-hexaene-10-carboxamide .
user
C22H24N2O2
assistant