In vitro studies indicate that miquelianin (quercetin 3-O-beta-D-glucuronopyranoside) is able to reach the CNS from the small intestine. - Juergenliemk,G.; Boje,K.; Huewel,S.; Lohmann,C.; Galla,H.; Nahrstedt,A. (Planta Med, 2003)