摘要:
The antibiotic, L-681,217, having antibacterial and growth-permittant activity, is produced by fermentation of Streptomyces cattleya in a suitable nutrient media.
摘要:
Disclosed is a fermentation process for preparing and isolating the antibiotic, (5R,6S,8S)-3-(2-aminoethylthio)-6-(1-hydroxyethyl)-7-oxo-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid in substantially pure form.
摘要:
The invention relates to a novel tri-yne carbonate of formula I. Such compound can be produced by isolating it from the fermentation broth of ATCC-53614, ATCC-53615 OR ATCC-53616. The tri-yne carbonate has antifungal activity.
摘要:
Disclosed is a fermentation process for producing and isolating 6-hydroxymethyl-2-(2-aminoethylthio)-1-carbadethiapen-2-em-3-carboxylic acid (I) which is useful as an antibiotic: ##STR1##
摘要:
Derivatives of C-076 compounds are described in which the C-076 molecule, a series of macrolides, has the 23-hydroxy group thereof oxidized to the 23-keto group. The 23-keto compounds are prepared by selectively oxidizing the suitably protected 23-hydroxy compound using such oxidizing agents as pyridinium dichromate, chromic acid-dimethyl pyrazole, chromic acid, chromic acid-acetic acid, and the like. Alternatively, selective oxidation of the unprotected 23-hydroxy compound may be accomplished by placing the compound in soil. Further reaction of the oxidized C-076 compounds is also possible. The compounds thus produced have profound anthelmintic, insecticidal, ectoparasiticidal, and acaricidal activity. Compositions containing the described C-076 derivatives as the active ingredient thereof are also disclosed.
摘要:
A process for obtaining a compound of the formula ##STR1## in crystalline form by solubilizing the compound in warm aqueous n-propanol and then allowing the solution to stand at ambient temperature until crystal formation is substantially complete is described. The crystalline compound obtained thereby is also described.