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ÎҲ鵽µÄ°×èëËáµÄÊý¾ÝÀ´×ÔCHEMICAL CONSTITUENTS OF Viburnum betulifolium ¡¾ÔÓÖ¾£ºChemistry of Natural Compounds, Vol. 49, No. 2, May, 2013 [Russian original No. 2, March¨CApril, 2013]¡¿£¬
Betulinic Acid (6). Colorless powder. 13C NMR (125 MHz, CDCl3, , ppm): 39.5 (t, C-1), 33.0 (t, C-2), 76.6 (d, C-3),
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(t, C-12), 38.9 (d, C-13), 41.9 (s, C-14), 30.9 (t, C-15), 32.7 (t, C-16), 57.5 (s, C-17), 49.6 (d, C-18), 48.2 (d, C-19), 150.3 (s, C-20),
34.5 (t, C-21), 33.7 (t, C-22), 24.6 (q, C-23), 19.8 (q, C-24), 16.8 (q, C-25), 17.6 (q, C-26), 15.0 (q, C-27), 183.5 (q, C-28),
111.0 (t, C-29), 19.5 (q, C-30).
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4Â¥: Originally posted by xcc0703 at 2013-12-29 16:22:40
ÎҲ鵽µÄ°×èëËáµÄÊý¾ÝÀ´×ÔCHEMICAL CONSTITUENTS OF Viburnum betulifolium ¡¾ÔÓÖ¾£ºChemistry of Natural Compounds, Vol. 49, No. 2, May, 2013 ¡¿£¬
Betulinic Acid (6). Colorless powder. 13C NMR (125 MHz, ...

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