You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Name the molecular formula for the molecule established as (5S)-2-[(3-chlorophenyl)methylsulfanyl]-5-(3-hydroxyphenyl)-3,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-4,7-dione using the IUPAC nomenclature.
user
C20H16ClN3O3S
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