In vitro activity of (S)-9-(3-hydroxy-2-phosphonylmethoxypropyl)-adenine against newly isolated clinical varicella-zoster viras strains

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Abstract
The highly potent and selective anti-DNA virus agent (S)-9-(3-hydroxy-2-phosphonylmethoxypropyl)adenine [(S)-HPMPA] was found to inhibit in vitro the replication of a number of clinical varicella-zoster virus strains within the concentration range of 0.63—5.7 ng/ml. With a mean 50 % inhibitory concentration of 1.8 ng/ml and selectivity index of 29000, (S)-HPMPA is one of the most potent and most selective varicella-zoster virus inhibitors discovered to date.