You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[(1R)-2-(7-methyl-2,3-dihydro-1-benzofuran-3-yl)-1-[(2-phenylacetyl)amino]ethyl]boronic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H22BNO4
assistant