You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 2-[2-(3,4-dihydro-2H-quinolin-1-yl)-2-oxoethyl]-8-phenyl-6,7-dihydroimidazo[2,1-c][1,2,4]triazine-3,4-dione into its molecular formula.
user
C22H21N5O3
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