You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
21-amino-19-ethyl-19-hydroxy-10-propyl-17-oxa-3,13-diazapentacyclo[11.8.0.02,11.04,9.015,20]henicosa-1(21),2,4,6,8,10,15(20)-heptaene-14,18-dione is the IUPAC name of a molecule. Please give its molecular formula.
user
C23H23N3O4
assistant