The new cassane-type diterpenes from Caesalpinia minax.

@article{Ma2012TheNC,
  title={The new cassane-type diterpenes from Caesalpinia minax.},
  author={Guoxu Ma and Jing-quan Yuan and Li Cao and Jun-shan Yang and Xu-dong Xu},
  journal={Chemical \& pharmaceutical bulletin},
  year={2012},
  volume={60 6},
  pages={
          759-63
        }
}
Four new cassane-type diterpenes, Neocaesalpin S (1), Neocaesalpin T (2), Neocaesalpin U (3), and Neocaesalpin V (4) were isolated from Caesalpinia minax HANCE together with seven known compounds Neocaesalpin A (5), Neocaesalpin K (6), Neocaesalpin L (7), Neocaesalpin M (8), Neocaesalpin O (9), Neocaesalpin MP (10), and Magnicaesalpin (11). Their structures were elucidated on the basis of 1D- and 2D-NMR, MS, and circular dichroism (CD) analysis. Compounds 1-4 were tested against liver cancer… 
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