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system
Name the molecular formula for the molecule established as (1R,2R,5R,7R,8R,9R,11R,14R,15S)-8-[4-(dimethylamino)-3,6-dimethyloxan-2-yl]oxy-14-ethyl-2,5,7,9,11,15-hexamethyl-7-(2-oxobut-3-enoxy)-13,16-dioxa-3-azabicyclo[13.3.0]octadecane-10,12,17-trione;(4R,5S,9R,10R,13R,15R,22R,23R)-23-[4-(dimethylamino)-3,6-dimethyloxan-2-yl]oxy-4-ethyl-1,5,10,13,15,22-hexamethyl-3,6,16-trioxa-11-azatricyclo[13.5.3.05,9]tricosane-2,7,18,21-tetrone using the IUPAC nomenclature.
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C72H120N4O18
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