You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[(3R,4S,6R)-6-[[(6R,8S,8aS)-6-[[(6R,8R,8aS)-7-azido-6-oct-7-enoxy-2-phenyl-4,4a,6,7,8,8a-hexahydropyrano[3,2-d][1,3]dioxin-8-yl]oxy]-7-[(2S,4S,5R)-6-methyl-3,4,5-tris(phenylmethoxy)oxan-2-yl]oxy-2-phenyl-4,4a,6,7,8,8a-hexahydropyrano[3,2-d][1,3]dioxin-8-yl]oxy]-5-azido-3,4-dimethyloxan-2-yl]methyl acetate is the IUPAC name of a molecule. Please give its molecular formula.
user
C71H86N6O17
assistant