You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 4-[2-[[4-[(E)-3-[(2R)-2-[3-[N-ethyl-4-[(4-nitronaphthalen-1-yl)diazenyl]anilino]propanoylamino]-3-oxo-3-(prop-2-ynylamino)propyl]sulfanylprop-2-enoyl]benzoyl]amino]ethylcarbamoyl]-2-(3-hydroxy-6-oxoxanthen-9-yl)benzoic acid into molecular formula.
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C60H50N8O12S
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