Claims for Patent: 11,944,620

Summary for Patent: 11,944,620

Title:	Stable pharmaceutical composition for oral administration
Abstract:	Provided is a stable pharmaceutical composition for oral administration comprising 6-ethyl-3-({3-methoxy-4-[4-(4-methylpiperazin-1-yl)piperidin-1-yl]phenyl}amino)-5-(tetrahydro-2H-pyran-4-ylamino)pyrazine-2-carboxamide (hereinafter referred to as compound A) or a pharmaceutically acceptable salt thereof, wherein the generation of related substances during storage is inhibited. In the stable pharmaceutical composition for oral administration, the proportion of crystals of compound A or a pharmaceutically acceptable salt thereof is 60% or more with respect to the total amount of compound A or a pharmaceutically acceptable salt thereof.
Inventor(s):	Masakazu Miyazaki, Ryohei ISHIBA, Yuki TAKAISHI, Fumiaki UEJO
Assignee:	Astellas Pharma Inc
Application Number:	US18/316,368
Patent Litigation and PTAB cases:	See patent lawsuits and PTAB cases for patent 11,944,620
Patent Claims:	1. A pharmaceutical composition for oral administration comprising: 6-ethyl-3-({3-methoxy-4-[4-(4-methylpiperazin-1-yl)piperidin-1-yl]phenyl}amino)-5-(tetrahydro-2H-pyran-4-ylamino)pyrazine-2-carboxamide or a pharmaceutically acceptable salt thereof and at least one pharmaceutical additive selected from the group consisting of lactose, D-mannitol, anhydrous dibasic calcium phosphate, talc, calcium stearate, magnesium stearate, microcrystalline cellulose, hydroxypropyl cellulose, hypromellose, corn starch, low-substituted hydroxypropyl cellulose, and croscarmellose sodium, wherein a proportion of crystals of 6-ethyl-3-({3-methoxy-4-[4-(4-methylpiperazin-1-yl)piperidin-1-yl]phenyl}amino)-5-(tetrahydro-2H-pyran-4-ylamino)pyrazine-2-carboxamide or the pharmaceutically acceptable salt thereof is at least 62% with respect to a total amount of 6-ethyl-3-({3-methoxy-4-[4-(4-methylpiperazin-1-yl)piperidin-1-yl]phenyl}amino)-5-(tetrahydro-2H-pyran-4-ylamino)pyrazine-2-carboxamide or the pharmaceutically acceptable salt thereof in the pharmaceutical composition, wherein the pharmaceutical composition exhibits an increase of no more than 0.11% of an oxidative decomposition product having a relative retention time of 1.06 with respect to a retention time of 6-ethyl-3-({3-methoxy-4-[4-(4-methylpiperazin-1-yl)piperidin-1-yl]phenyl}amino)-5-(tetrahydro-2H-pyran-4-ylamino)pyrazine-2-carboxamide, as measured by a high-performance liquid chromatography method, after storage under opened conditions of 40° C. and 75% relative humidity for 1 month, and wherein the high-performance liquid chromatography method is performed under following conditions: a Kinetex XB-C18 column, particle size: 2.6 μm, 4.6 mm (an inner diameter)×75 mm; a column temperature maintained at 40° C.; a mobile phase A of a perchlorate solution (pH 2.2); a mobile phase B of an acetonitrile solution; a sample solution having a sample concentration of 0.8 mg/ml of 6-ethyl-3-({3-methoxy-4-[4-(4-methylpiperazin-1-yl)piperidin-1-yl]phenyl}amino)-5-(tetrahydro-2H-pyran-4-ylamino)pyrazine-2-carboxamide in a 4:1 mixture of the perchlorate solution (pH 2.2) and the acetonitrile solution; a standard solution having a standard solution concentration of 0.008 mg/ml of 6-ethyl-3-({3-methoxy-4-[4-(4-methylpiperazin-1-yl)piperidin-1-yl]phenyl}amino)-5-(tetrahydro-2H-pyran-4-ylamino)pyrazine-2-carboxamide in a 4:1 mixture of the perchlorate solution (pH 2.2) and the acetonitrile solution; an ultraviolet absorption spectrophotometer detector with a wavelength at 220 nm; and a gradient of the mobile phase A and mobile phase B is as follows: (a) from 0 minutes to 2 minutes since sample injection, 96% mobile phase A and 4% mobile phase B; (b) from 2 minutes to 5 minutes since sample injection, 96% incrementing down to 85% mobile phase A and 4% incrementing up to 15% mobile phase B; (c) from 5 minutes to 20 minutes since sample injection, 85% incrementing down to 68% mobile phase A and 15% incrementing up to 32% mobile phase B; (d) from 20 minutes to 25 minutes since sample injection, 68% incrementing down to 30% mobile phase A and 32% incrementing up to 70% mobile phase B; (e) from 25 minutes to 26 minutes since sample injection, 30% mobile phase A and 70% mobile phase B; (f) from 26 minutes to 26.1 minutes since sample injection, 30% incrementing up to 96% mobile phase A and 70% incrementing down to 4% mobile phase B; and (g) from 26.1 minutes to 30 minutes since sample injection, 96% mobile phase A and 4% mobile phase B. 2. The pharmaceutical composition according to claim 1, wherein the at least one pharmaceutical additive exhibits a loss on drying of 1.0% or less after storage under opened conditions of 40° C. and 75% relative humidity for 1 week. 3. The pharmaceutical composition according to claim 1, comprising 6-ethyl-3-({3-methoxy-4-[4-(4-methylpiperazin-1-yl)piperidin-1-yl]phenyl}amino)-5-(tetrahydro-2H-pyran-4-ylamino)pyrazine-2-carboxamide hemifumarate. 4. The pharmaceutical composition according to claim 1, wherein a content of 6-ethyl-3-({3-methoxy-4-[4-(4-methylpiperazin-1-yl)piperidin-1-yl]phenyl}amino)-5-(tetrahydro-2H-pyran-4-ylamino)pyrazine-2-carboxamide or the pharmaceutically acceptable salt thereof in the pharmaceutical composition is 10% by weight to 40% by weight with respect to 100% by weight of the pharmaceutical composition. 5. The pharmaceutical composition according to claim 1, wherein a pharmaceutical additive content in the pharmaceutical composition is 50% by weight to 70% by weight with respect to 100% by weight of the pharmaceutical composition. 6. The pharmaceutical composition according to claim 1, wherein a pharmaceutical additive content in the pharmaceutical composition is 50% by weight to 60% by weight with respect to 100% by weight of the pharmaceutical composition. 7. The pharmaceutical composition according to claim 1, wherein a pharmaceutical additive weight content in the pharmaceutical composition is 1.5 times to 4.5 times that of 6-ethyl-3-({3-methoxy-4-[4-(4-methylpiperazin-1-yl)piperidin-1-yl]phenyl}amino)-5-(tetrahydro-2H-pyran-4-ylamino)pyrazine-2-carboxamide or the pharmaceutically acceptable salt thereof. 8. The pharmaceutical composition according to claim 1, wherein the at least one pharmaceutical additive is lactose or D-mannitol. 9. The pharmaceutical composition according to claim 3, wherein the proportion of crystals of 6-ethyl-3-({3-methoxy-4-[4-(4-methylpiperazin-1-yl)piperidin-1-yl]phenyl}amino)-5-(tetrahydro-2H-pyran-4-ylamino)pyrazine-2-carboxamide hemifumarate is 62% to 98% with respect to the total amount of 6-ethyl-3-({3-methoxy-4-[4-(4-methylpiperazin-1-yl)piperidin-1-yl]phenyl}amino)-5-(tetrahydro-2H-pyran-4-ylamino)pyrazine-2-carboxamide hemifumarate in the pharmaceutical composition. 10. The pharmaceutical composition according to claim 9, wherein the at least one pharmaceutical additive exhibits a loss on drying of 1.0% or less after storage under opened conditions of 40° C. and 75% relative humidity for 1 week. 11. The pharmaceutical composition according to claim 9, comprising 40 mg to 50 mg of 6-ethyl-3-({3-methoxy-4-[4-(4-methylpiperazin-1-yl)piperidin-1-yl]phenyl}amino)-5-(tetrahydro-2H-pyran-4-ylamino)pyrazine-2-carboxamide hemifumarate. 12. The pharmaceutical composition according to claim 9, wherein a pharmaceutical additive content in the pharmaceutical composition is 50% by weight 70% by weight with respect to 100% by weight of the pharmaceutical composition. 13. The pharmaceutical composition according to claim 9, wherein a pharmaceutical additive content in the pharmaceutical composition is 50% by weight to 60% by weight with respect to 100% by weight of the pharmaceutical composition. 14. The pharmaceutical composition according to claim 2, wherein a pharmaceutical additive weight content in the pharmaceutical composition is 1.5 times to 4.5 times that of 6-ethyl-3-({3-methoxy-4-[4-(4-methylpiperazin-1-yl)piperidin-1-yl]phenyl}amino)-5-(tetrahydro-2H-pyran-4-ylamino)pyrazine-2-carboxamide hemifumarate. 15. The pharmaceutical composition according to claim 9, wherein the at least one pharmaceutical additive is lactose or D-mannitol. 16. The pharmaceutical composition according to claim 1, which is a tablet. 17. The pharmaceutical composition according to claim 3, which is a tablet. 18. The pharmaceutical composition according to claim 11, which is a tablet.