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,2R,7R,10S,11S,12R)-15-phenyl-13,15,17-triazaheptacyclo[8.7.0.02,7.02,8.07,12.09,11.013,17]heptadecane-3,6,14,16-tetrone ?
user
C20H15N3O4
assistant