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system
Name the molecular formula for the molecule established as methyl (9R,11R,12S,19S)-12-ethyl-4-[(12S)-16-ethyl-12-methoxycarbonyl-1,10-diazatetracyclo[12.3.1.03,11.04,9]octadeca-3(11),4,6,8,15-pentaen-12-yl]-10-hydroxy-5-methoxy-8,11-dimethyl-8,16-diazapentacyclo[10.6.1.01,9.02,7.016,19]nonadeca-2,4,6,13-tetraene-10-carboxylate using the IUPAC nomenclature.
user
C44H54N4O6
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