You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule 2-methylpropyl (6S)-6-[4-(butylcarbamoylamino)phenyl]-3-ethyl-4-methyl-2-sulfanylidene-1,6-dihydropyrimidine-5-carboxylate .
user
C23H34N4O3S
assistant