You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule bis[[2-[4-(4,5-dihydroimidazol-1-ylamino)-2-oxo-3H-indol-1-yl]acetyl]oxy]mercury into molecular formula.
user
C26H26HgN8O6
assistant