Crystals of phenylalanine derivatives and production methods thereof

The present invention provides crystals of phenylalanine derivatives of the formula (I): and particularly α-type, γ-type, ε-type, η-type, and θ-type crystals thereof. These crystals are excellent in preservation stability or moisture resistance. They can also be produced on an industrial scale.

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Bibliographic Details
Main Authors Takahashi, Shinichiro, Kataoka, Noriyasu, Tatara, Akinori, Matsuzawa, Toshihiro
Format Patent
LanguageEnglish
Published 31.05.2011
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Summary:The present invention provides crystals of phenylalanine derivatives of the formula (I): and particularly α-type, γ-type, ε-type, η-type, and θ-type crystals thereof. These crystals are excellent in preservation stability or moisture resistance. They can also be produced on an industrial scale.