lipiarmycin [ PAR 101,PAR-101,PAR101,fidaxomicin,lipiarmycin A3,lipiarmycin A4,lipiarmycin B,lipiarmycin B3,lipiarmycin B4,tiacumicin B,tiacumicin C,tiawmicin B ] antibiotic from strain of Actinoplanes which inhibits nucleic acid polymerases; Rn given refers to lipiarmycin A3