摘要:
This invention provides new antifungal compounds of Formula I or II: ##STR1## wherein R, R.sup.1 and R.sup.2 are defined in the specification produced by culture LL-15G256 (Hypoxylon oceanicum), NRRL 21363 and their production by fermentation and use as antifungal agents.
摘要:
A process for the preparation of optically pure diastereoisomers of tetrahydrofolate compounds is described, comprising the conversion, for example, of only the 5,6S,7,8-tetrahydrofolic acid component of a racemic mixture of 5,6,7,8-tetrahydrofolic acid to 10-formyl-5,6S,7,8-tetrahydrofolic acid in the presence of a formyl tetrahydrofolate synthetase, followed by cyclizing, hydrolyzing and derivatizing. The process is also useful to make a desired substantially pure (6R or 6S) enantiomer of a derivative of (radiolabeled) tetrahydrofolic acid or a salt or ester thereof.
摘要:
A process for obtaining metal-free corrinoids consisting of inoculating a culture media free of added compounds of metals of the VIIIth group of the Periodic Table with a parent strain of Rhodopseudomonas, cultivating under illumination, repeating the steps of inoculating and cultivating employing said culture media and said illumination employing a part of the sequential culture from the preceding stage as an inoculum in each subsequent state, for a series of several pre-production culture stages, inoculating said culture media with the preceding sequential culture for the last time, cultivating under illumination, separating the microorganism from the culture media of the production culture stage and isolating metal-free corrinoids from the culture media of the production culture stage.
摘要:
New antibacterial agents produced by fungal culture 07F275, of which the compound designated 07F275 alpha having the following structure: ##STR1## is representative. Methods for the fermentation, recovery and purification from crude solutions are also disclosed.
摘要:
A process for producing red metal corrinoids comprising reacting yellow metal-free corrinoids having main absorptions .lambda..sub.max of 480 and 290 nm, in a liquid medium, with complex-forming metal ions to give yellow metal corrinoids, and alkalizing said metal corrinoids by treatment with an alkali.