Ju-Cheng Zhang

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A new alkylamine derivative and a common fatty acid were isolated from Streptomyces sp. YIM 66142. On the basis of spectral data, including HRMS, NMR and 2D NMR, their structures were determined as medelamine C (1) and isomyristic acid (2). The omega-hydroxyl group in structure 1 is rare in a natural alkylamine. The possible biosynthetic pathway in the(More)
Herbicidins are isolated from different strains of Streptomyces, and they exhibit several interesting biological activities.1–5 Herbicidins A and B indicated no activity at a concentration of 100 μg mL 1 against Xanthomonas oryzae in vitro, but protection of the leaves of rice plant from bacterial leaf blight disease was caused by X. oryzae.1 Herbicidins A(More)
Three-dimensional quantitative structure-activity relationship (3D-QSAR) studies were performed on Frusectose-1, 6-bisphosphatase (FBPase) inhibitors, based on molecular docking obtained by using GOLD and comparative molecular field analysis (CoMFA). Three random splits into training and test sets had been performed and the high leave-one-out (LOO)(More)
In the present paper, the authors prepared all the samples by the same method, and optimized the work conditions for flame qtomic absorption spectrometry. FAAS was applied to determine the trace elements, such as Pb, Cr, Cd, Cu, Zn, Hg, Se etc, in Elsholtzia bodineri Vaniot. from Mengzi, Shiping, Mile and Jianshui located in Honghe state. The method is(More)
A new natural mycotoxin was isolated from the fermentation broth of Trichoderma sp. Jing-8 and the structure was determined as alternariol 1'-hydroxy-9-methyl ether (1), together with twelve known compounds. The structures were elucidated on the basis of their 1D, 2D NMR spectra and mass spectrometric data. Compounds 1, 8 and 9 indicated inhibitions against(More)
OBJECTIVE To establish the solid three-dimensional fluorescence fingerprint spectra for the main root and branch root of Panax notoginseng. METHODS With the Xuesaitong power as a control, the solid three-dimensional fluorescence technique was employed to establish the fingerprint spectra. RESULTS The fluorescence peaks of Xuesaitong power were at 230(More)
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