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1 .     5-hydroxy-2-pyridinecarboxylic acid
C6H5NO3     ÏàËÆ¶È:75%
Journal of Shenyang Pharmaceutical University          2009          26          878-881
Chemical constituents from Portulaca oleracea L.
DING Huai-wei, LI Fei-fei, SONG Shao-jiang
Structure      13C NMR   Ì¼Æ×Ä£Äâͼ
2 .     6-hydroxy-3-pyridinecarboxylic acid
C6O3NH5     ÏàËÆ¶È:75%
Lishizhen Medicine and Materia Medica Research          2005          16          97-98
Study on the Chemical Constituents of Premna microphylla Turez
DAI Sheng-jun; TANG Wen-zhao; DING Xing-bao
Structure      13C NMR   Ì¼Æ×Ä£Äâͼ
3 .     5-hydroxy-picolinic acid
    ÏàËÆ¶È:75%
Journal of Chinese Medicinal Materials          2010          33          373-376
Studies on the Chemical Constituents from Aerial Parts of Gynura divaricata
CHEN Lei, SONG Zeng-yan, WANG Jin-jiang, SONG Hong-tao, ZHANG Guo-gang, WANG Jin-hui
Structure      13C NMR   Ì¼Æ×Ä£Äâͼ
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