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What is the molecular formula of the compound with this IUPAC name [20,22,23,25-tetraacetyloxy-21-(acetyloxymethyl)-19,26-dihydroxy-3,15,26-trimethyl-6,16-dioxo-2,5,17-trioxa-11-azapentacyclo[16.7.1.01,21.03,24.07,12]hexacosa-7(12),8,10-trien-15-yl] benzoate ?
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C43H49NO19
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