You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named 15-phenanthren-9-yl-12,18-dioxa-1lambda5-phosphaheptacyclo[15.11.1.02,11.05,10.013,29.019,28.020,25]nonacosa-2(11),3,5,7,9,13,15,17(29),19(28),20,22,24,26-tridecaene 1-oxide is given. What is its corresponding molecular formula?
user
C40H23O3P
assistant