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首页> 外文期刊>Journal of pharmaceutical sciences. >Polymorphs and hydrates of acyclovir.
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Polymorphs and hydrates of acyclovir.

机译:阿昔洛韦的多晶型物和水合物。

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Acyclovir (ACV) has been commonly used as an antiviral for decades. Although the crystal structure of the commercial form, a 3:2 ACV/water solvate, has been known since 1980s, investigation into the structure of anhydrous ACV has been limited. Here, we report the characterization of four anhydrous forms of ACV and a new hydrate in addition to the known hydrate. Two of the anhydrous forms appear as small needles and are stable to air exposure, whereas the third form is morphologically similar but quickly absorbs water from the atmosphere and converts back to the commercial form. The high-temperature modification is achieved by heating anhydrous form I above 180 degrees C. The crystal structures of anhydrous form I and a novel hydrate are reported for the first time.
机译:数十年来,阿昔洛韦(ACV)通常被用作抗病毒药。尽管自1980年代以来就已经知道商业形式的晶体结构,即3:2 ACV /水溶剂化物,但对无水ACV结构的研究仍受到限制。在这里,我们报告了除已知水合物外的四种无水形式的ACV和新水合物的表征。无水形式中的两种表现为小针状,并且对空气暴露是稳定的,而第三种形式在形态上相似,但是很快从大气中吸收水并转化回商业形式。高温改性是通过将无水形式I加热到180摄氏度以上来实现的。首次报道了无水形式I和新型水合物的晶体结构。

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