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 10-ethyl-10-hydroxy-8-oxa-21-thia-4,15-diazahexacyclo[14.7.1.02,14.04,13.06,11.020,24]tetracosa-1,6(11),12,14,16(24),17,19-heptaene-5,9-dione .
user
C22H18N2O4S
assistant