Ammonium methylphosphate

Figure I. Schematic structures of model anionic receptor sites, ammonium methylphosphate (AMP), ammonium methylsulphate (AMS), and the eight compounds studied...

In this study both the PCILO and empirical energy methods were used to characterize intermolecular interactions of typical N-substituents of rigid opiates with model anionic receptor sites. Ammonium methylphosphate (AMP) and ammonium methylsulfate (AMS) were used as model anionic receptor sites. Interaction energies of eight compounds which, as N-substituents. modulate different antagonist/agonist potencies... 

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