28022-11-9 Antibiotic W-847-A Antibiotic XK 41C Megalomicin Megalomicin A Megalomicina [INN-Spanish] Megalomicine [INN-French] Megalomicinum [INN-Latin] Megalomycin-A Piperacilina [INN-Spanish] Piperacillin Piperacillina Piperacilline [INN-French] Piperacillinum [INN-Latin]