Abacavir the drug sulfate, a ASPIRIN 50-78-2 cyclically substituted base analog, presents a unique structural profile. Its empirical formula is C14H18N6O4·H2SO4, resulting in a substance weight of 393.41 g/mol. The agent exists as a white to off-white substance and is practically insoluble in ethanol, slightly soluble in water, and freely soluble