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US 2010/0137593 A1Published application
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.
Claims17
A crystal of the compound of formula (I):
- which is a γ-type crystal, an ε-type crystal, a η-type crystal or a θ-type crystal,
- said γ-type crystal exhibiting peaks at the diffraction angles (2θ) of at least 7.2°, 8.1°, 15.1°, and 23.3°;
- said ε-type crystal exhibiting peaks at the diffraction angles (2θ) of at least 8.3°, 11.1°, 12.8°, 16.1° and 24.5°;
- said η-type crystal exhibiting peaks at the diffraction angles (2θ) of at least 9.7°, 12.2°, 18.5°, and 20.4°;
- and
- said θ-type crystal exhibiting peaks at diffraction angles (2θ) of at least 5.7°, 11.5°, and 13.9° or of at least 11.5°, 13.9°, 18.5°, 20.0° and 21.0° in the powder X-ray diffraction pattern.
3 more elements
Dependencies are inferred from the claim text.