Abstract
Przewalskinic acid A is a rare, water-soluble, and highly biologically active ingredient found, thus far, only in the Salvia przewalskii Maxim herb; however, the content in S. przewalskii herb is very low. In order to obtain useful quantities of przewalskinic acid A, the biotransformatin of salvianolic acid B from Salvia miltiorrhiza root (danshen in Chinese) into przewalskinic acid A was studied using a crude enzyme produced from Aspergillus oryzae D30s strain. The crude enzyme from the A. oryzae strain hydrolyzed salvianolic acid B into przewalskinic acid A and danshensu. The preparation afforded 31.3 g przewalskinic acid A (91.0 % purity) and 13.1 g danshensu (95 % purity) from 75 g salvianolic acid B. The preparation of przewalskinic acid A was therefore very successful with a yield of over 86 %, but the yield of danshensu was only 33 %. The product przewalskinic acid A was identified using ultra-performance liquid chromatography–mass spectrometry (UPLC–MS) and NMR.
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Acknowledgments
This work was supported by the Major Projects of National Science and Technology “Significant new drugs creation” Project of China No. 2012ZX09503001-003; the Program for Liaoning Innovative Research Teams in Universities (LNIRT: 2009T007, LT2010009) and the National Science of Foundation of the People’s Republic of China (NSFC).
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Liu, C., Jin, Y., Yu, H. et al. Preparation of przewalskinic acid A from salvianolic acid B using a crude enzyme from an Aspergillus oryzae strain. J Ind Microbiol Biotechnol 41, 887–892 (2014). https://doi.org/10.1007/s10295-013-1399-7
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DOI: https://doi.org/10.1007/s10295-013-1399-7