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Three new sesquiterpenoids, 2α-hydroxy-3,3,6α,9β-tetramethyltricyclo[4,3,2 1,4 ]undecane ( 1 ), 11-acetoxyeudesman-4β-ol ( 4 ), and 2α,3β-dihydroxy-4β-methyl-6,8,10-cadinatriene ( 6 ), four known sesquiterpenoids ( 2 ,  3 ,  5 , and  7 ), together with eight known diterpenoids ( 8 – 15 ), were isolated from the wood of  Cunninghamia konishii.  Their structures were determined by detailed analysis of spectroscopic data and comparison with the data of known analogues. Four sesquiterpenoids ( 1 ,  4 ,  5 , and  6 ) and all the diterpenoids ( 8 – 15 ) were evaluated for inhibition of nitric oxide production in lipopolysaccharides (LPS)-activated RAW 264.7 macrophages and the results showed that compounds  10  and  15  exhibited moderate inhibitory activities against nitric oxide production.

Sesquiterpenoids and Diterpenoids from the Wood of Cunninghamia konishii and Their Inhibitory Activities against NO Production