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system
Provide the molecular formula for the IUPAC named substance [25-acetyloxy-1,11,21-trihydroxy-17-(1-hydroxyethyl)-13-(2-methoxy-2-oxoethylidene)-10,10,26,26-tetramethyl-5-(2-methylperoxyethylidene)-19-oxo-18,27,28,29-tetraoxatetracyclo[21.3.1.13,7.111,15]nonacos-8-en-12-yl] octa-2,4-dienoate .
user
C47H70O17
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