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 3-[3-[5-[5-(5a,9a-dihydrodibenzothiophen-4-yl)naphthalen-1-yl]naphthalen-1-yl]phenyl]phenanthro[9,10-b]pyrazine .
user
C54H34N2S
assistant