You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-amino-1-cyclopropyl-6-fluoro-8-methoxy-7-[(3R)-3-[(1S)-1-(methylamino)ethyl]pyrrolidin-1-yl]quinazoline-2,4-dione is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H26FN5O3
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