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Concentration-dependent relaxation of sinomenine on NE-, PDB- and KCl-induced vasorelaxations. Symbols used are sinomenine in pretreatments with NE (open circles, n = 6), PDB (triangles, n = 6) and KCl (squares, n = 6). Values (%) represent mean ± S.E.M. *: P < 0.05, **: P < 0.01, ***: P < 0.001, with respect to control value.
