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system
Name the molecular formula for the molecule established as 10-(hydroxymethyl)-13-methyl-2,6,7,8,9,11,12,14,15,16-decahydro-1H-cyclopenta[a]phenanthrene-3,17-dione;10-(2-methoxyethoxymethoxymethyl)-13-methyl-2,6,7,8,9,11,12,14,15,16-decahydro-1H-cyclopenta[a]phenanthrene-3,17-dione;[10-(2-methoxyethoxymethoxymethyl)-13-methyl-3-trimethylsilyloxy-6,7,8,9,11,12,14,15-octahydro-1H-cyclopenta[a]phenanthren-17-yl]oxy-trimethylsilane;5-methyl-18-oxapentacyclo[14.3.1.01,13.02,10.05,9]icos-13-ene-6,15-dione using the IUPAC nomenclature.
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C91H136O16Si2
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