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 11-[4-(4-methylpyridin-3-yl)phenyl]-6,16-diphenyl-8,14-dioxa-1lambda5-phosphapentacyclo[11.7.1.02,7.09,21.015,20]henicosa-2,4,6,9,11,13(21),15,17,19-nonaene 1-oxide .
user
C42H28NO3P
assistant