You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (4R)-4-[[(4R)-5-[[(2S,5R)-5-(2-carboxyethyl)-1-naphthalen-1-yl-3,6-dioxoheptan-2-yl]amino]-4-[(4-nitrophenyl)methyl]-2,5-dioxopentyl]carbamoyl]-6-oxononanedioic acid by IUPAC nomenclature, provide its molecular formula.
user
C42H47N3O14
assistant