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Customization of Aspergillus niger Morphology Through Addition of Talc Micro Particles
Published on: March 15, 2012
A new pregnane steroid from cultures of Aspergillus versicolor
Jian-Hai Ding1,2, Zhang-Gui Ding2, Jiang-Yuan Zhao2
1a College of Chemistry and Chemical Engineering , Ningxia Normal University , Guyuan , PR China.
Abstract:
A new pregnane steroid, named aspergillon A (1), together with two known compounds, (22E,24R)-ergosta-5,7,22-trien-3β-ol (2) and (22E, 24R)-ergosta-4,6,8(14),22-tetraen-3-one (3) were isolated from cultures of the tin mine tailings-associated fungus Aspergillus versicolor. The new structure and absolute configuration were determined with the help of extensive spectroscopic analyses and quantum chemical calculations of the electronic circular dichroism (ECD) spectra.
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