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 6-hydroxy-10,10,12,15-tetramethyl-3-oxa-9-azatetracyclo[7.7.1.02,7.013,17]heptadeca-1(17),2(7),5,13,15-pentaene-4,8-dione .
user
C19H19NO4
assistant