You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[3-[(6-methoxy-1H-pyrazolo[3,4-b]pyridin-5-yl)amino]-8-thia-4,6,11-triazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6-tetraen-11-yl]-2-methylpropan-1-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C20H21N7O2S
assistant