Fig. 1From: The standardized Withania somnifera Dunal root extract alters basal and morphine-induced opioid receptor gene expression changes in neuroblastoma cellsChromatogram of WSE (a) obtained using an HPLC system (Shimadzu, LC 2010 A, Japan) equipped with UV detector, auto-injector, and column oven with class VP software (see Methods for details); numbers above peaks refer to the withanolides reported in the lower panel of the figure (b)Back to article page