You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the compound with this IUPAC name 5-O-[2-[4-(3-chlorophenyl)piperazin-1-yl]ethyl] 3-O-ethyl 2-amino-6-methyl-4-(3-nitrophenyl)-1,4-dihydropyridine-3,5-dicarboxylate ?
user
C28H32ClN5O6
assistant