PROCESS FOR THE PREPARATION OF A COMPOUND OF FORMULA I IN THE FORM OF A SINGLE STEREOISOMER IN CRYSTALLINE FORM, COMPRISING DEPROTECTING THE AMINE GROUP IN A COMPOUND OF FORMULA IIA OR IN A MIXTURE OF A COMPOUND OF FORMULA IIA WITH A COMPOUND OF FORMULA IIB AND ISOLATING A COMPOUND OF FORMULA I FROM THE REACTION MIXTURE； COMPOUNDS AND SALTS OF COMPOUNDS OF FORMULA I IN CRYSTALLINE FORM； PHARMACEUTICAL COMPOSITIONS COMPRISING SUCH SALTS； PROCESSES FOR THE PREPARATION OF INTERMEDIATES AND INTERMEDIATES IN A PROCESS FOR THE PREPARATION OF A COMPOUND OF FORMULA I. FIG. 1
