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KMID : 0620720190250040354
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Natural Product Sciences
2019 Volume.25 No. 4 p.354 ~ p.357
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Two New Caffeoyl Threonate Esters from the Leaves of Toxicodendron vernicifluum
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Jang Jae-Young
Ahn Jong-Hoon
Jo Yang-Hee
Turk Ayman
Kang So-Young
Hwang Bang-Yeon
Lee Mi-Kyeong
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Abstract
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Toxicodendron vernicifluum, also called as Rhus verniciflua is a deciduous tree belonging to Anacardiaceae family. Two new caffeoyl threonate esters, rhuseols A (1) and B (2), together with 5-O-(E)- caffeoylquinic acid methyl ester (3) were isolated from the leaves of T. vernicifluum. The structures of isolated compounds were established by using 1D and 2D NMR in combination with HR-ESI-MS. Compounds 1 - 3 showed DPPH radical scavenging effects with IC50 values of 47.9, 107.8 and 15.4 μM, respectively. Taken together, these compounds might contribute to the antioxidant properties of the leaves of T. vernicifluum, which will be useful for various oxidative stress mediated diseases.
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KEYWORD
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Toxicodendron vernicifluum, caffeoyl threonate esters, antioxidant effect
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