Esters type penem, process for the preparation, containing the drug

Esters type penem, process for their preparation, medicament containing them. The invention relates to esters of (5R, 6S) -carbamoyloxymethyl-6- [1 (R) -hydroxyethyl] -2-penem useful-3-carboxylic acid as antibiotics likely to be adsorbed through oral, having the general formula II below wherein R is acetoxymethyl, pivaloyloxymethyl, methoxymethyl, methoxyethoxymethyl, phthalidyl, alpha-ethoxycarbonyloxyethyl, acetamidomethyl, benzamidomethyle. (CF DRAWING IN BOPI)