Annulated Heterocyclo-Purines I. Fused Five-Membered Heterocyclo-Purinediones, -Purinones, and -Purineimines
Purines fused with five-membered heterocycles: pyrrolo-, oxazolo-, thiazolo-, imidazo-, pyrazolo-, triazolo- and tetrazolo-purines. Purines annulated with five-membered rings. Compounds with a greater selective efficacy without the unwanted side-effects.
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