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What is the molecular formula of the molecule [(2R,3R,4S,5R,6R)-3,4,5-triacetyloxy-6-[(1,3-dimethyl-5-nitro-2,6-dioxo-1,3-diazinan-4-ylidene)amino]oxan-2-yl]methyl acetate ?
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C20H26N4O13
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