1. A pharmaceutical composition comprising a compound of the formula (I)
and a pharmaceutically acceptable carrier, in which 100 percent by weight relative to the total weight of all forms of the compound of formula (I) in the composition is in crystalline form of Modification (I), wherein the compound of the formula (I) is characterized by an X-Ray powder diffractogram comprising peak maxima of the 2 Theta angle of 6.7, 9.1 and 17.8.