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 15-ethyl-3-phenanthren-9-yl-8-phenyl-1,14-diaza-8lambda5-phosphatetracyclo[7.6.1.02,7.013,16]hexadeca-2,4,6,9,11,13(16),14-heptaene 8-oxide .
user
C35H25N2OP
assistant