Abstract
Alisol G, also named 25-anhydroalisol A, is a major triterpene obtained from dried rhizomes of Alisma orientalis. This paper investigated the transformation of alisol G by fungi and evaluated the hCE2 inhibitory effects of the transformed products. By screening whole cells of 10 strains of filamentous fungi, Penicillium janthinellum AS 3.510 exhibited a special capability to transform alisol G. Four metabolites were obtained, which were determined to be new compounds on the basis of spectroscopic data, including UV, 1D- and 2D-NMR, and HRESIMS. In addition, in an in vitro bioassay, metabolites 1–4 showed significant hCE2 inhibitory activities with IC50 values of 6.81, 16.66, 3.38, and 6.33 μM, respectively.
Published Version
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