You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
methyl (4S)-5-[[(2S)-1-ethoxy-3-methyl-1-oxobutan-2-yl]carbamoyloxy]-2,6-dimethyl-4-(3-nitrophenyl)-1,4-dihydropyridine-3-carboxylate is the IUPAC name of a molecule. Please give its molecular formula.
user
C23H29N3O8
assistant