You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(1R,4R,5R,8R)-2-[4-cyclohexyl-5-[[ethyl-[3-(4-methylpiperazin-1-yl)propyl]amino]methyl]oxolan-2-yl]-9-formyl-5-methyl-13-propan-2-yltetracyclo[7.4.0.02,11.04,8]tridec-12-ene-1-carboxylic acid The above is the IUPAC name of a molecule. Write its molecular formula.
user
C40H65N3O4
assistant