You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance dimethyl 6-amino-5-cyano-1-[4-(3-methylbutanoylamino)phenyl]-4-phenyl-4H-pyridine-2,3-dicarboxylate .
user
C27H28N4O5
assistant