You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[(6R,7S,7aR)-7-acetyloxy-2-ethoxy-2-methyl-5,6,7,7a-tetrahydro-3aH-[1,3]dioxolo[4,5-b]pyran-6-yl] acetate;[(3R,4S,5R)-2-acetyloxy-4,5-dimethoxyoxan-3-yl] acetate;(6R,7S,7aR)-2-ethoxy-6,7-dimethoxy-2-methyl-5,6,7,7a-tetrahydro-3aH-[1,3]dioxolo[4,5-b]pyran;[(3R,4S,5R)-2-bromo-4,5-dimethoxyoxan-3-yl] acetate;[(3R,4S,5R)-4,5-diacetyloxy-6-bromooxan-3-yl] acetate;(3R,4S,5R)-oxane-2,3,4,5-tetrol;propan-2-one;[(3R,4S,5R)-4,5,6-triacetyloxyoxan-3-yl] acetate is the IUPAC name of a molecule. Please give its molecular formula.
user
C76H122Br2O48
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