You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[[[2-[2-(dimethylamino)ethyl-ethylamino]-2-oxoethyl]amino]methyl]-6-(hydroxymethyl)pyridine-4-carboxylic acid The above is the IUPAC name of a molecule. Write its molecular formula.
user
C16H26N4O4
assistant