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US 7,683,169 B2Granted
Crystals of phenylalanine derivatives and production methods thereof
AssigneeAjinomoto Co., Inc.
InventorsShinichiro Takahashi, Noriyasu Kataoka, Akinori Tatara, Toshihiro Matsuzawa
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Abstract
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.
Claims15
A crystal of the compound of formula (I):
- which is an α-type crystal which exhibits peaks at the diffraction angles (2θ) of at least 6.2°, 10.7°, and 14.0° in the powder X-ray diffraction pattern.
Dependencies are inferred from the claim text.