You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-propan-2-yl-1,3-dihydro-2-benzofuran;3-propan-2-yl-2,3-dihydro-1-benzofuran is the IUPAC name of a molecule. Please give its molecular formula.
user
C22H28O2
assistant