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system
Provide the molecular formula for the IUPAC named substance 2-[3-[[(2R,4S)-4-amino-5-methyl-1,3-dioxo-1-(propan-2-ylamino)hexan-2-yl]carbamoyl]-4-methoxyanilino]-2-oxoacetic acid .
user
C20H28N4O7
assistant