A Simple Synthesis of 1-Acyl-3-aryl-3H-pyrrolo[2′,3′:4,5]pyrimido[6,1-b]benzothiazol-6-ium-2-olates: Betainic Derivatives of a Novel Heterocyclic System
A Simple Synthesis of 1-Acyl-3-aryl-3H-pyrrolo[2′,3′:4,5]pyrimido[6,1-b]benzothiazol-6-ium-2-olates: Betainic Derivatives of a Novel Heterocyclic System