We previously synthesized a semisynthetic GA derivative, soloxolone N-3-(dimethylamino)propylamide (Sol-DMAP, Figure 1), which demonstrated a high inhibitory effect on P-gp efflux function in P-gp-overexpressing human cervical carcinoma KB-8-5 and murine lymphosarcoma RLS40 cells [27]. Here, PGP is linked to lymphoma.