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(a) Nitric oxide production inhibition induced by Chenopodium album L. (b) Non-linear regression analyses: ● raw extract, ▲ CH2Cl2 fraction. (c) Nitric oxide production inhibition induced by Sisymbrium officinale (L.) Scop. and (d) non-linear regression analyses: ● raw extract, ◊ n-hexane fraction. Data were expressed as means ± S.E.M. (n = 4). *** P < 0.001 compared to control (Dunnett’s test).
