| 摘要 |
A substantially pure isostructural pseudopolymorph of 9-deoxo-9a-aza-9a-methyl-9a-homoerythromycin A having the Formula I:
wherein S is an organic solvent which is at least partially miscible with water, x is 1, y is 0, 0.5, or 1, the pseudopolymorph being characterized by the monoclinic space group P 2 1 and average unit cell parameters comprising: crystal axis lengths of a = 15.5 - 17.0 Å, b = 15.5 - 17.0 Å and c = 17.5 - 19.5 Å, and angles between the crystal axes of ± = ³ = 90° and ² = 106° - 112°.
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