prov:value
| - r or nitrogen atoms, alkylaryl, arylalkyl, preferably benzyl, phenethyl, phenylpropyl or phenylbutyl, heteroarylalkyl, preferably furylmethyl, thienylethyl or pyridylpropyl, particularly pyridyl, phenyl, tolyl, ethylphenyl, butylphenyl or halophenyl, or a pharmaceutically acceptable cation, such as an alkali metal or alkaline earth metal, including sodium, potassium, calcium and ammonium cations;
|