You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[2-[bis[2-[[1-(2,3-dihydroxypropyl)-3-hydroxy-4-oxopyridine-2-carbonyl]amino]ethyl]amino]ethyl]-1-(2,3-dihydroxypropyl)-3-hydroxy-4-oxopyridine-2-carboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C33H45N7O15
assistant