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2'-4'-h alo-1,1'-biphenyl!-4-yl!methyl!-5'-methyl-spirocyclopentane-1,7' (8'H)-3H! imidazo2,1-b!purin!-4' (5'H)-ones

US Patent 5824683 · Granted Oct 20, 1998

Estimated economic value: $238,251,000

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