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 5,17-bis(9H-fluoren-9-yl)-25,26,27,28-tetrapropoxypentacyclo[19.3.1.13,7.19,13.115,19]octacosa-1(25),3,5,7(28),9(27),10,12,15(26),16,18,21,23-dodecaene .
user
C66H64O4
assistant