You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 3-[3-(4-propylpiperazine-1,4-diium-1-yl)propyl]-2-sulfanylidene-1H-pyrido[2,3-d]pyrimidin-4-one into its molecular formula.
user
C17H27N5OS+2
assistant