1. The drug substance comprising the compound of structural formula I: wherein said drug substance is a solid, and wherein said drug substance has a specific BET surface area in the range from about 2.9 m / g to about 94 m / D.2. The drug substance of Claim. 1, wherein said drug substance has a specific BET surface area from about 2.9 m / g to about 9.6 m / D.3. The drug substance of Claim. 1, wherein said drug substance has a specific BET surface area in the range from about 2.9 m / g to about 9.4 m / D.4. A pharmaceutical composition comprising at least one drug according to Claim. 1 and at least one pharmaceutically acceptable nositel.5. A pharmaceutical composition according to claim. 4, which further comprises at least one napolnitel.6. A method for isolating a drug substance comprising: a) depositing a compound of structural formula I: at a temperature below about 5,0 ° C of a supersaturated solution to form a slurry b) optionally distilling said slurry to form a concentrate c) filtering said slurry to form a concentrate or wet filter cake and d) drying said wet cake to obtain a powder, wherein the powder comprises a release of the drug iukazannoe release of the drug has a specific BET surface area in the range from about 2.9 m / g to about 94 m / D.7. A method according to claim. 6, wherein said step is carried out b) .8 distillation. A method according to claim. 6, wherein said distillation step b) is carried out n1. Лекарственное вещество, содержащее соединение структурной формулы I:где указанное лекарственное вещество представляет собой твердое вещество, и где указанное лекарственное вещество имеет удельную площадь поверхности по БЭТ в диапазоне от приблизительно 2,9 м2/г до приблизительно 94 м2/г.2. Лекарственное вещество по п. 1, где указанное лекарственное вещество имеет удельную площадь поверхности по БЭТ от приблизительно 2,9 м2/г до приблизительно 9,6 м2/г.3. Лекарственное вещество по п. 1, где указанное лекарственное вещество имеет удельную площадь
