You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named [3-(4-ethylphenyl)-5-[3-(4-methylpyridin-2-yl)-1,2,4-oxadiazol-5-yl]piperidin-1-yl]-morpholin-4-ylmethanone by IUPAC nomenclature, provide its molecular formula.
user
C26H31N5O3
assistant