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- W2002162945 abstract "The microbiological transformation of progesterone by the local moulds Aspergillus niger and Rhizopus nigricans was studied. To a 48 hr old culture, progesterone (0.4 g/l medium) dissolved in ethanol was added and the transformation was left to proceed for 72 hr. Thereafter, the different transformation products were resolved chromatographically. The identity of each product was established through the determination of mp, mixed mp, optical rotation and ultraviolet as well as infrared absorption spectra. A comparison of the Rf values of each product with that of the corresponding reference using different solvent systems as well as their colours with two spray reagents was used as a further proof for the identity of the isolated products. In case of A. niger, progesterone was converted to 17α-hydroxyprogesterone; 21-hydroxyprogesterone (cortexone); 11α-hydroxyprogesterone; 11α,17α-dihydroxyprogesterone; 6β,11α-dihydroxyprogesterone and 11α, 17α, 21-trihydroxyprogesterone (epicortisol). These products together with 11α-hydroxy-5α-pregnane-3,20-dione were also identified in case of R. nigricans." @default.
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- W2002162945 date "1970-04-01" @default.
- W2002162945 modified "2023-09-26" @default.
- W2002162945 title "Transformation of Progesterone by<i>Aspergillus niger</i>100 and<i>Rhizopus nigricans</i>REF, 129" @default.
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- W2002162945 doi "https://doi.org/10.1246/bcsj.43.1239" @default.
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