You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule identified by N-(5-chloro-2,4-dimethoxyphenyl)-4-([1,3]thiazolo[5,4-b]pyridin-2-yl)piperazine-1-carboxamide ?
user
C19H20ClN5O3S
assistant