Patent ID: 7872153

Claim:
A hydrogen sulfate salt of a compound of formula I in crystalline form, said salt characterised by (i) an X-ray powder pattern taken with a powder diffractometer comprising the following interlattice plane intervals: d in [Å] (±0.1 Å): 21.3, 12.4, 10.7, 10.1, 8.4, 7.9, 6.7, 6.0, 5.3, 4.9, 4.7, 4.5, 4.4, 4.1; or (ii) an ATR-IR spectrum having the following absorption bands expressed in reciprocal wave numbers (cm −1 ): 3353 (br), 3078, 2960, 2935, 2876, 1660 (C═O), 1516 (amid II), 1470, 1444, 1425, 1389, 1371, 1260, 1234 (Aryl-O), 1191, 1163, 1140, 1047, 872, 809, 768, 723.