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system
Name the molecular formula for the molecule established as ethyl (1'S,3S,4'R,6'S,7'Z,14'R)-5-ethyl-1-hydroxy-9-methoxy-14'-[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]-2',15'-dioxospiro[1,2-dihydropyrano[2,3-c]quinoline-3,18'-16-azatricyclo[14.3.0.04,6]nonadec-7-ene]-4'-carboxylate;ethyl (1S,4R,6S,7Z,14R,18S)-5'-ethyl-9'-methoxy-14-[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]-1',2,15-trioxospiro[16-azatricyclo[14.3.0.04,6]nonadec-7-ene-18,3'-2H-pyrano[2,3-c]quinoline]-4-carboxylate using the IUPAC nomenclature.
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C82H106N4O18
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