You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 1-[(5-tert-butyl-1,3-oxazol-2-yl)methyl]-3-[2-(furan-2-yl)-2-piperidin-1-ylethyl]-2-methylguanidine by IUPAC nomenclature, provide its molecular formula.
user
C21H33N5O2
assistant