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-[3-[(4S)-2-amino-4-methyl-5,6-dihydro-1,3-thiazin-4-yl]phenyl]pyrazolo[1,5-a]pyridine-3-carboxamide ?
user
C19H19N5OS
assistant