Triptolide inhibits murine-inducible nitric oxide synthase expression by down-regulating lipopolysaccharide-induced activity of nuclear factor-κB and c-Jun NH2-terminal kinase - Kim,Y.H.; Lee,S.H.; Lee,J.Y.; Choi,S.W.; Park,J.W.; Kwon,T.K. (Eur J Pharmacol, 2004)