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-[[2-(2-amino-7-fluoro-1,3-benzothiazol-6-yl)-9-oxa-1,3-diazatricyclo[6.5.1.04,14]tetradeca-2,4(14),5,7-tetraen-6-yl]oxy]propanamide ?
user
C21H20FN5O3S
assistant