You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 3-[7-methyl-5-(trifluoromethyl)-6,6a,8,9-tetrahydro-4H-indolo[4,3-fg]quinolin-9-yl]-1,1-bis(1,1,2,2,2-pentafluoroethyl)urea into molecular formula.
user
C21H15F13N4O
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