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Substituted-6H,8H-pyrimido-[1,2,3-cd]purine-8,10-(9H)-diones and substituted-6H,10H-pyrimido[1,2-cd]purin-10-ones

US Patent 4904658 · Granted Feb 27, 1990

Estimated economic value: $3,745,000 ⓘ

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