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 3-cyclohexyl-5-[[4-oxo-2-(2-phenylethylamino)pyrido[1,2-a]pyrimidin-3-yl]methylidene]-2-sulfanylidene-1,3-thiazolidin-4-one using the IUPAC nomenclature.
user
C26H26N4O2S2
assistant