You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3,10,17,20-tetranaphthalen-2-ylheptacyclo[13.9.2.02,11.04,9.012,25.016,21.022,26]hexacosa-1(25),2,4,6,8,10,12,14,16,18,20,22(26),23-tridecaene is the IUPAC name of a molecule. Please give its molecular formula.
user
C66H38
assistant