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(4R,6R,6As)-6-(5-methyl-2,4-dioxopyrimidin-1-yl)-4-[(phosphanylideneamino)oxymethyl]spiro[6,6a-dihydro-3aH-furo[3,4-d][1,3]dioxole-2,1'-cyclohexane]-4-carbaldehyde


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