[ 14c ] -labeled josamycin ( wilprafen ) readily enters several types of human phagocytic cells-polymorphonuclear leucocytes ( pmnls ) , adherent monocytes and alveolar macrophages - and is accumulated by these cells to a concentration about 20 times that in the extracellular medium .
C0022419
josamycin
C0878193
wilprafen