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 8-(dimethylamino)-19-hydroxy-19-prop-1-ynyl-17-oxa-3,7,13-triazapentacyclo[11.8.0.02,11.04,9.015,20]henicosa-1(21),2,4(9),5,7,10,15(20)-heptaene-14,18-dione .
user
C22H18N4O4
assistant