You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2R,6R)-10-(2-fluorophenyl)-4-(oxan-4-ylmethyl)-7-oxa-1,4,11,12-tetrazatricyclo[7.3.0.02,6]dodeca-9,11-diene The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H23FN4O2
assistant