You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule N-[3-[[(4S)-6-(4-chlorophenyl)-4-[2-(ethylamino)-2-oxoethyl]-1-methyl-4H-[1,2,4]triazolo[4,3-a][1,4]benzodiazepin-8-yl]oxy]propyl]-3,4-dihydroxybenzamide into molecular formula.
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C31H31ClN6O5
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