Abacavir the drug sulfate, a cyclically substituted base analog, presents a unique structural ALRESTATIN 51876-97-2 profile. Its empirical formula is C14H18N6O4·H2SO4, resulting in a molecular weight of 393.41 g/mol. The compound exists as a white to off-white crystalline solid and is practically insoluble in ethanol, slightly soluble in acetone,