12677-11-1 3(C)-Demethyl-4(C)-O-methylmithramycin Antibiotic 6604-9A Mithramycin, 3(sup C)-demethyl-4(sup C)-O-methyl- Mithramycin, 3-C-demethyl-4-C-methyl- Mithramycin, 3E-demethyl-4E-O-methyl-, (4AR,4DS)- NSC 269146 Varamycin Variamitsin Variamycin Variamycin glycoside