Fig. 2. 1H– 1H COSY correlations for compounds 6–10 and key HMBC correlations for compounds 1 and 6–10 in Iridoids and bis-iridoids from Valeriana jatamansi and their cytotoxicity against human glioma stem cells

Fig. 2. 1H– 1H COSY correlations for compounds 6–10 and key HMBC correlations for compounds 1 and 6–10.