You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[1,3-diacetyloxy-4,9-dihydroxy-2-methyl-2-(2-methylpropanoyloxy)-5,10-dioxo-1,3,4,11-tetrahydrobenzo[b]fluoren-11-yl]iminoazanide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C26H25N2O10-
assistant