You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[(1S)-2,2-difluorocyclobutyl]-8-[(2-oxo-1-propan-2-ylpyridin-3-yl)amino]-10-oxa-2,3,7,13-tetrazatricyclo[7.4.0.02,6]trideca-1(9),3,5,7-tetraene-5-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C21H23F2N7O3
assistant