You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
5-[3-methyl-2-(1,1,2,3,3-pentamethyl-6-propyl-2H-inden-5-yl)but-1-enyl]-1,2-oxazole The above is the IUPAC name of a molecule. Write its molecular formula.
user
C25H35NO
assistant