Tanshinone congeners improve memory impairments induced by scopolamine on passive avoidance tasks in mice. - Kim,D.H.; Jeon,S.J.; Jung,J.W.; Lee,S.; Yoon,B.H.; Shin,B.Y.; Son,K.H.; Cheong,J.H.; Kim,Y.S.; Kang,S.S.; Ko,K.H.; Ryu,J.H. (Eur J Pharmacol, 2007)