You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
S-[2-(2-iodophenyl)ethyl] (2S,4aR,6R,7S,8S,8aS)-6-[[(2R,4aR,6S,7S,8S,8aR)-2-[2-(2-iodophenyl)ethylsulfanylcarbonyl]-6-[(2R,3R,4S,5R,6R)-6-methoxy-4,5-bis(phenylmethoxy)-2-(phenylmethoxymethyl)oxan-3-yl]oxy-2-phenyl-7-phenylmethoxy-4,4a,6,7,8,8a-hexahydropyrano[3,2-d][1,3]dioxin-8-yl]oxy]-8-hydroxy-2-phenyl-7-phenylmethoxy-4,4a,6,7,8,8a-hexahydropyrano[3,2-d][1,3]dioxine-2-carbothioate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C86H86I2O18S2
assistant