You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
7-amino-N-[5-[2-[3-[(7-amino-9,9-diethylfluorene-2-carbonyl)amino]-4-hydroxyphenyl]-1,1,1,3,3,3-hexafluoropropan-2-yl]-2-hydroxyphenyl]-9,9-diethylfluorene-2-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C51H46F6N4O4
assistant