7-Demethyl-64-O-demethyl-19-deoxy-22,31,45-trichlororistomycin A aglycone 89139-41-3 A41030A Antibiotic A 41030A BRN 5489276 Ristomycin A aglycone, 7-demethyl-64-O-demethyl-19-deoxy-22,31,45-trichloro-