Abstract
Rifampicin is a semi-synthetic drug derived from rifamycin B, and
currently integrates the fixed dose combination tablet formulations used
in the treatment of tuberculosis. It is also used in the leprosy
polychernotherapy and prophylaxis, which are diseases classified as
neglected according to the World Health Organization. Rifampicin is a
polymorphic drug and its desirable polymorphic form is labeled as II,
being the main goal of this study the elucidation of its crystalline
structure. Polymorph II is characterized by two molecules with different
conformations in the asymmetric unit and the following lattice parameters: a = 14.0760 (10) angstrom
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