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system
Provide the molecular formula for the IUPAC named substance ethyl (1R,2S)-1-[2-[(2S,4R)-1-[(2S)-3,3-dimethyl-2-[(2-methylpropan-2-yl)oxycarbonylamino]butanoyl]-4-(3-thiophen-2-ylquinoxalin-2-yl)oxypyrrolidin-2-yl]-2-oxoethyl]-2-ethenylcyclopropane-1-carboxylate .
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C37H46N4O7S
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