Nucleosides and nucleotide analogues, pharmaceutical composition

Drug – bio-affecting and body treating compositions – Designated organic active ingredient containing – Carbohydrate doai

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514 50, 536 23, 536 2852, 536 2853, A61K 3170

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active

052159701

ABSTRACT:
A compound of the formula ##STR1## wherein the radicals A, X, R.sup.1, R.sup.2 and R.sup.3 are defined as follows: ##STR2## R.sup.2 : H; or R.sup.2 constitutes together with R.sup.3 with a carbon - carbon bond

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