You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[4-[[methyl-(5-methyl-1,3,4-oxadiazol-2-yl)amino]methyl]piperidin-1-yl]-1-phenylethanol is the IUPAC name of a molecule. Please give its molecular formula.
user
C18H26N4O2
assistant