framstellning by a mixture of 3 - tiometulrifamycin s, 3 - tiometylrifamycin en, rifamycin s, rifamycin sv and a new ansamycin designated 32 656 by cultivation of a microorganism benemnd lacustris micromonospora sp. nov....

摘要

A new species of Micromonospora, designated Micromonospora lacustris sp. nov. Routien, when subjected to submerged aerobic fermentation under controlled conditions, produces a mixture of at least 13 antibiotics. Two of these antibiotics are rifamycin S and rifamycin SV. Two other members of the antibiotic mixture are the 3-thiomethyl derivatives of rifamycin S and rifamycin SV.