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 6-[[6-[(2R)-2-ethylmorpholine-4-carbonyl]-7H-pyrrolo[2,3-d]pyrimidin-4-yl]amino]-3H-1,3-benzothiazol-2-one .
user
C20H20N6O3S
assistant