abstract |
purifiednRifaximine α,na polymorph of the antibiotic rifaximin, wherein said rifaximin α has a water contentnof less than 4.5% and produces a powder X-ray diffractogram,nthe peak at values of the diffraction angles 2θ of 6.6 °; 7.4 °; 7.9 °; 8.8 °; 10.5 °; 11.1 °; 11.8 °; 12.9 °; 17.6 °; 18.5 °; 19.7 °; 21.0 °; 21.4 °; 22,1 ° shows. |