Fig. 4From: Neoboutonia melleri var velutina Prain: in vitro and in vivo hepatoprotective effects of the aqueous stem bark extract on acute hepatitis modelsTryptophan identification from F3 fraction. In blue: NVH F3_38–41, a compound isolated from F3 fraction; In red: standard tryptophan. The isolated compound from F3 fraction has been compared to tryptophan by NMRBack to article page