The present invention relates to crystalline polymorphs of 3-O-(3,3-dimethylsuccinyl)betulinic acid di-N-methyl-D-glucamine salt (DSB•2NMG)), pharmaceutical compositions of the same and use of the same as an active pharmaceutical agent in the treatment of HIV related disorders.Polymorphes cristallins de sel di-N-méthyle-D-glucamine dacide 3-O-(3,3-diméthylsuccinyle) bétulinique (DSB 2NMG)), compositions pharmaceutiques correspondantes et utilisation comme agent pharmaceutique actif dans le traitement des troubles liés au VIH.