Providing crystals that have good oral absorbability and can be obtained with particularly good reproducibility. (2,4-dioxo-3,4-dihydropyrimidin-1 (2H) -yl) -methyl- Ethoxy) propane-1-sulfonamide. <; / RTI >;경구 흡수성이 양호하고, 특히 양호한 재현성으로 취득 가능한 결정의 제공.(R)-N-(1-(3-(시클로펜틸옥시)페닐)에틸)-3-((2,4-디옥소-3,4-디하이드로피리미딘-1(2H)-일)메톡시)프로판-1-술폰아미드의 결정.