You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 2-[(4S)-6-(4-chlorophenyl)-8-[4-(3,4-dihydroxyphenyl)-4-oxobutoxy]-1-methyl-4H-[1,2,4]triazolo[4,3-a][1,4]benzodiazepin-4-yl]-N-ethylacetamide into molecular formula.
user
C31H30ClN5O5
assistant