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 7-[(4-chlorophenyl)methyl]-3-methyl-8-prop-2-enylsulfanyl-4,5-dihydropurine-2,6-dione .
user
C16H17ClN4O2S
assistant