You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-[3-[2-(2-methyl-5,6,7,8-tetrahydro-1,8-naphthyridin-3-yl)ethyl]-2H-oxadiazol-5-yl]-4-phenylbutanoic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C23H28N4O3
assistant