You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule identified by (1S,13S)-25-ethyl-12,24-dioxa-25-azahexacyclo[11.11.1.02,11.03,8.014,23.015,20]pentacosa-2(11),3,5,7,9,14(23),15,17,19,21-decaene ?
user
C24H19NO2
assistant