Esters of Erythromycin IV**Pharmaceutical Research Dept., Eli Lilly and Co., Indianapolis 6, Ind

The alkyl sulfate salts of various erythromycin 1 esters were prepared by esterification of erythromycin followed by a double decomposition salt formation. These compounds, and in particular propionyl erythromycin lauryl sulfate, are virtually tasteless and are unaffected by mixing with gastric acid. These properties render them very useful in the preparation of flavored suspensions.