US7728134B2 - Hydrates and Polymorphs of 4[[(7r)-8-Cyclopentyl-7-Ethyl-5,6,7,8-Tetrahydro-5-Methyl-6-Oxo-2-Pteridinyl]amino]-3-Methoxy-N-(1-Methyl-4-Piperidinyl)-Benzamide, Process for Their Manufacture and Their Use as Medicament