4-hydroxypenicillin V;p-hydroxypenicillin U;DXLWRYXQESUXNE-VBVNFKHJSA-N;6β-[2-(4-hydroxy-phenoxy)-acetylamino]-penicillanic acid;Phenoxymethylpenicillin EP Impurity D;Phenoxymethylpenicillin Impurity 4(Phenoxymethylpenicillin EP Impurity D);(2S,5R,6R)-3,3-Dimethyl-7-oxo-6-[[2;p-Hydroxypenicillin V (~90%)