You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule (5Z)-5-[[2-[4-(3-chlorophenyl)piperazin-1-yl]-7-methyl-4-oxopyrido[1,2-a]pyrimidin-3-yl]methylidene]-3-[[(2R)-oxolan-2-yl]methyl]-2-sulfanylidene-1,3-thiazolidin-4-one .
user
C28H28ClN5O3S2
assistant