You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule (4R,7S,13R)-13-[[(2S)-2-amino-3-(4-hydroxyphenyl)propanoyl]amino]-3,3,14,14-tetramethyl-7-[(1R)-1-(4-nitrophenyl)ethyl]-6,9,12-trioxo-1,2-dithia-5,8,11-triazacyclotetradecane-4-carboxylic acid into molecular formula.
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C31H40N6O9S2
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