[4-(2-Amino-6-hydroxy-9H-purin-9-yl)butoxy]methylphosphonic acid
[4-(2-Amino-6-hydroxy-9H-purin-9-yl)butoxy]methylphosphonic acid ??
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[4-(2-Amino-6-hydroxy-9H-purin-9-yl)butoxy]methylphosphonic acid C??? ??, ??, ??
[4-(2-Amino-6-hydroxy-9H-purin-9-yl)butoxy]methylphosphonic acid ?? ?? ? ???
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[4-(2-Amino-6-hydroxy-9H-purin-9-yl)butoxy]methylphosphonic acid ?? ??
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