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 7-(2-hydroxyphenyl)-5-(2-methoxyphenyl)-3-(4-methoxyphenyl)-2-sulfanylidene-1H-pyrido[2,3-d]pyrimidin-4-one using the IUPAC nomenclature.
user
C27H21N3O4S
assistant