<unk>  (INN, also known as mithramycin; trade name Mithracin) is an antineoplastic antibiotic produced by Streptomyces plicatus. It is an RNA synthesis inhibitor. The manufacturer discontinued production in 2000. Several different structures are currently reported in different places all with the same chromomycin core, but with different stereochemistry in the glycoside chain, a 1999 study has re-investigated the compound and proposed a revised structure.
Plicamycin
Vancomycin 
Hetacillin
Midecamycin
Meropenem
Clindamycin hydrochloride 
Oxacillin
Piperacillin