You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule 2-chloro-N-[3-[(2S)-1-(ethylamino)-1-oxopropan-2-yl]-1,3-benzothiazol-2-ylidene]benzamide ?
user
C19H18ClN3O2S
assistant