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1 .     rhodizonic acid
C6H2O6     ÏàËÆ¶È:66.6%
Helvetica Chimica Acta          1977          60          948-958
13C-NMR. Spectra, Structure and Reactivity of Cyclic Oxocarbons
Werner Stdeli, Roger Hollenstein and Wolfgang Von Philipsborn
Structure      13C NMR   Ì¼Æ×Ä£Äâͼ

--------------------------------------------------------------------------------

2 .     D-aspartic acid
    ÏàËÆ¶È:50%
China Journal of Chinese Materia Medica          2007          32          695-698
Chemical constituents from leaves of Morus multicaulis
HAN Weili, LIU Li, ZHANG Xiaoqi, YE Wencai, PAN Yile, YAO Xinsheng
Structure      13C NMR   Ì¼Æ×Ä£Äâͼ

--------------------------------------------------------------------------------

3 .     4-amino-4-oxobutanoic acid
C4H7NO3     ÏàËÆ¶È:50%
Russian Journal of Organic Chemistry          2009          45          1644-1650
Reaction of ¦Ã-dicarboxylic acids amides and imides with trifluoromethanesulfonamide and formaldehyde
M. Yu. Moskalik, V. I. Meshcheryakov and B. A. Shainyan
Structure      13C NMR   Ì¼Æ×Ä£Äâͼ

--------------------------------------------------------------------------------

4 .     methyl succinate
    ÏàËÆ¶È:50%
Chinese Traditional and Herbal Drugs          2013          44          524-527
Chemical constituents in ethyl acetate extract from aerial part of Gynura divaricata
CHEN Jian, MANGELINCKX Sven, LV Han, LI Wei-lin, DE KIMPE Norbert, WANG Zheng-tao,
Structure      13C NMR   Ì¼Æ×Ä£Äâͼ

--------------------------------------------------------------------------------

5 .     ÌìÃŶ¬ËØ
    ÏàËÆ¶È:50%
Journal of Chinese Medicinal Materials          2001          24          865-867
Studies on Chemical Constituents from the Flower of Citrus aurantium
Huang Shengyang, Hu Shilin
Structure      13C NMR   Ì¼Æ×Ä£Äâͼ

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