Patent ID: 7956063

Claim:
A pharmaceutical composition comprising a pharmaceutically acceptable carrier and a compound of formula (I-a) wherein the compound of formula (I-a) is a polymorphic form selected from the group consisting of: Form B characterized by X-ray powder diffraction peaks at two-theta positions 4.5°±0.2°, 8.8°±0.2°, and 12.5°±0.2°, and further characterized by X-ray powder diffraction peaks at two-theta positions 10.3°±0.2°, 14.7°±0.2°, 20.6°±0.2°, 22.2°±0.2°, and 26.1°±0.2°; Form C characterized by X-ray powder diffraction peaks at two-theta positions 11.9°±0.2°, 14.3°±0.2° and 22.3°±0.2°, and further characterized by X-ray powder diffraction peaks at two-theta positions 12.8°±0.2°, 18.5°±0.2°, 21.2°±0.2°, 24.3°±0.2°, and 26.0°±0.2°; and Form D characterized by X-ray powder diffraction peaks at two-theta positions 6.6°±0.2°, 11.6°±0.2°, and 17.1°±0.2°, and further characterized by X-ray powder diffraction peaks at two-theta positions 15.0°±0.2°, 19.2°±0.2°, 20.5°±0.2°, 21.6°±0.2°, and 29.8°±0.2°.