Ethanol. 2-[[(3aR.4S.6R.6aS)-6-[7-chloro-5-(propylthio)-3H-1.2.3-triazolo[4.5-d]pyrimidin-3-yl]tetrahydro-2.2-dimethyl-4H-cyclopenta-1.3-dioxol-4-yl]oxy]-