You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3,5-dichloro-6-N-ethyl-6-N-(furan-2-ylmethyl)-2-N-methylpyridine-2,6-diamine is the IUPAC name of a molecule. Please give its molecular formula.
user
C13H15Cl2N3O
assistant