You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance 2-amino-4-[9-(3-amino-4-hydroxy-5-methylphenyl)-3,6-bis(2-phenylethynyl)fluoren-9-yl]-6-methylphenol .
user
C43H32N2O2
assistant