You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[4-[2-[(5,5,8,8-tetramethyl-6,7-dihydronaphthalen-2-yl)selanyl]ethynyl]phenyl]methanol is the IUPAC name of a molecule. Please give its molecular formula.
user
C23H26OSe
assistant