You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[[3-[[2,5-bis[C-hydroxy-N-[6-(1-hydroxybutylideneamino)pyridin-2-yl]carbonimidoyl]phenoxy]methyl]-5-[[3,5-bis[C-hydroxy-N-[6-(1-hydroxybutylideneamino)pyridin-2-yl]carbonimidoyl]phenoxy]methyl]phenyl]methoxy]-1-N,4-N-bis[6-(1-hydroxybutylideneamino)pyridin-2-yl]benzene-1,4-dicarboximidic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C87H90N18O15
assistant