You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
butane;N,N-dimethylmethanamine;ethyl-(3-ethylboranuidylimidazol-3-ium-1-yl)-methylboranuide;methane is the IUPAC name of a molecule. Please give its molecular formula.
user
C20H52B2N3-
assistant