Journal Article

Secondary Metabolites with Antimicrobial Activities from Chamaecyparis obtusa var. formosana

Wu, Ming-Der, Chen, Jih-Jung, Khamthong, Nanthaphong, Lin, Wen-Wei, Cheng, Ming-Jen, Kuo, Yueh-Hsiung

2022

Overview

Seven new compounds, including one dimer novel skeleton, chamaecyformosanin A (1); three diterpenes, chamaecyformosanins B–D (2–4); one sesquiterpene, chamaecyformosanin E (5); and two monoterpenes, chamaecyformosanins F and G (6 and 7) were isolated from the methanol extract of the bark of Chamaecyparis obtusa var. formosana. Their structures were established by the mean of spectroscopic analysis and the comparison of NMR data with those of known analogues. Their structures were elucidated on the basis of physicochemical evidence, in-depth NMR spectroscopic analysis, and high-resolution mass spectrometry. Furthermore, the isolated compounds were subjected to an evaluation of their antimicrobial activity. Metabolites 1, 3, and 4 present antibacterial activities. It is worth mentioning that the chemical composition of the bark of C. obtusa var. formosana has never been studied in the past. This is the first time the barks from C. obtusa var. formosana were studied and two new skeleton compounds, 1 and 7, were obtained.

• Publisher: MDPI AG,MDPI
• Subject: Anti-Infective Agents - chemistry / Anti-Infective Agents - pharmacology / Antimicrobial agents / Chamaecyparis - chemistry / Chamaecyparis - metabolism / Chamaecyparis obtusa var. formosana / Cupressaceae / dimer / Diterpenes - chemistry / diterpenoid / Drug Evaluation, Preclinical / Hydrocarbons / Magnetic fields / Magnetic Resonance Spectroscopy / Mass Spectrometry / Microbial Sensitivity Tests / Molecular Structure / novel skeleton / Pharmaceutical industry / Secondary Metabolism / Sesquiterpenes - chemistry / Taiwan / traditional herbal medicine