Acyclic nucleoside derivatives

Drug – bio-affecting and body treating compositions – Designated organic active ingredient containing – Having -c- – wherein x is chalcogen – bonded directly to...

Reexamination Certificate

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C514S263370, C544S276000, C544S277000

Reexamination Certificate

active

07432274

ABSTRACT:
Methods and novel intermediates for the preparation of and the treatment with acyclic nucleoside derivatives of the formula:where one of R1and R2is an amino acid acyl group and the other of R1and R2is a —C(O)C3-C21saturated or monounsaturated, optionally substituted alkyl andR3is OH or H.

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