You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(5Z)-5-[[2-[4-(3-aminopropanoyl)piperazin-1-yl]pyridin-3-yl]methylidene]-1,3-thiazolidine-2,4-dione The above is the IUPAC name of a molecule. Write its molecular formula.
user
C16H19N5O3S
assistant