You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule (2S)-2-amino-1-(2-benzyl-5,6,8,9-tetrahydro-[1,2,4]triazolo[1,5-d][1,4]diazepin-7-yl)-3-pyridin-4-ylpropan-1-one;dihydrochloride ?
user
C21H26Cl2N6O
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