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 butane;1,2-dimethylcyclobutane;5-ethyl-4-methoxy-N-[2-methyl-3-[2-methyl-3-(methylamino)phenyl]phenyl]pyridine-2-carboxamide;5-ethyl-4-methoxypyridine-2-carbaldehyde;1-methylsulfanylpropane .
user
C51H80N4O4S2
assistant