You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[4-amino-5-[[2-[4-(2-hydroxypropan-2-yl)piperidin-1-yl]-2-oxoethyl]iminomethyl]-2-methoxyphenyl]-6-(butylamino)pyridine-2-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C28H40N6O4
assistant