• Title/Summary/Keyword: p-coumaric acid methyl ester

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Isolation and Structural Determination of Free Radical Scavenging Compounds from Korean Fermented Red Pepper Paste (Kochujang)

  • Chung, Jin-Ho;Shin, Heung-Chule;Cho, Jeong-Yong;Kang, Seong-Koo;Lee, Hyoung-Jae;Shin, Soo-Cheol;Park, Keun-Hyung;Moon, Jae-Hak
    • Food Science and Biotechnology
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    • v.18 no.2
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    • pp.463-470
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    • 2009
  • Sixteen antioxidative active compounds isolated from the EtOAc layer of MeOH extracts of kochujang, Korean fermented red pepper paste, were structurally elucidated as fumaric acid, methyl succinate, succinic acid furan-2-yl ester methyl ester (gochujangate, a novel compound), 2-hydroxy-3-phenylpropanoic acid, 3,4-dihydroxybenzoic acid, 2,3-dihydroxybenzoic acid, 2,4-dihydroxybenzoic acid, 6,7-dihydroxy-2H-chromen-2-one (esculetin), caffeic acid, cis-p-coumaric acid, trans-p-coumaric acid, daidzin, genistin, apigenin 7-O-$\beta$-D-apiofuranosyl($1{\rightarrow}2$)-$\beta$-D-glucopyranoside, apigenin 7-O-$\beta$-Dglucopyranoside, and quercetin 3-O-$\alpha$-L-rhamnopyranoside by mass spectrometry (MS) and nuclear magnetic resonance (NMR) experiments. These compounds were analyzed for the first time as antioxidants from kochujang.