期刊
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
卷 59, 期 18, 页码 10124-10128出版社
AMER CHEMICAL SOC
DOI: 10.1021/jf2022868
关键词
Pyrus pyrifolia Nakai; pear fruit; hydroxycinnamoylmalic acid methyl ester; caffeoyl malate; coumaroyl malate
资金
- Ministry for Food, Agriculture, Forestry and Fisheries, Republic of Korea
Two novel caffeoylmalic acid methyl esters, 2-O-(trans-caffeoyl)malic acid 1-methyl ester (6) and 2-O-(transcaffeoyl)malic acid 4-methyl ester (7), were isolated from pear (Pyrus pyrifolia Nakai cv. Chuhwangbae) fruit peels. In addition, 5 known hydroxycinnamoylmalic acids and their methyl esters were identified: 2-O-(trans-coumaroyl)malic acid (1), 2-O-(cis-coumaroyl)malic acid (2), 2-O-(cis-coumaroyl)malic acid 1-methyl ester (3), 2-O-(trans-coumaroyl)malic acid 1-methyl ester (4), and 2-O-(trans-caffeoyl)malic acid (phaselic acid, 5). The chemical structures of these compounds were determined by spectroscopic data from ESI MS and NMR. Of all the isolated compounds, five hydroxycinnamoylmalic acids and their methyl esters (2-4, 6, 7) were identified in the pear for the first time.
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