You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the compound with this IUPAC name N-[(1R)-1-phenylethyl]-3-(2-piperidin-1-ylpyridin-4-yl)-1,2,4-oxadiazole-5-carboxamide ?
user
C21H23N5O2
assistant