| abstract |
(57) [Summary]n[Purpose] A new antibiotic, SF2748B, produced by actinomycete culture Quality, SF2748C 1 Substance, SF2748D substance and SF2748E substance To serve.n[Composition] Amicoratopsis sp. SF2748 strain is usually Cultured in a medium containing nutrients that can be utilized by Solvent extraction method, silica gel column from the obtained culture The target product was isolated using a chromatographic method or the like. New antibiotics SF2748B substance, SF2748C 1 Substance, SF2748D Substance and SF2748 The molecular formulas of E substances are C 46 H 82 N 2 O 15 , C 48 H 84 N 2 O 16 , C 36 H 65 NO 11 And C 29 H 53 NO 8 Is. |