You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named [(2R,3R,4R,5R)-4-acetyloxy-2-(acetyloxymethyl)-5-(3-amino-12-oxo-6,7,10,11-tetrazatricyclo[6.4.1.04,13]trideca-1(13),2,4,7,9-pentaen-6-yl)oxolan-3-yl] propanoate is given. What is its corresponding molecular formula?
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C21H23N5O8
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