You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(1R,2S,3R,4R)-6-(6-ethyl-5-fluoropyrimidin-4-yl)-1-(hydroxymethyl)-2-phenyl-6-azaspiro[2.4]heptan-4-ol is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H22FN3O2
assistant