Synthesis of potent CXCR4 inhibitors possessing low cytotoxicity and improved biostability based on T140 derivativesElectronic supplementary information (ESI) available: Fig. S1: behaviors of TE14005 (a), TE14011 and Ac-TE14011 (b) in mouse serum; Fig. S2: behaviors of TE14011 (a), Ac-TE14011 (b), TN14003 (c), Ac-TN14003 (d), TC14012 (e) and Ac-TC14012 (f) in rat liver homogenate; Table S1: characterization data of novel synthetic peptides; HPLC charts for synthetic compounds of TE14005, TE14011 and Ac-TE14011, and for a degraded sample of TE14011 in rat liver homogenate and its co-injection with an authentic compound des-[Arg1, Arg2, Nal3]-TE14011. See http://www.rsc.org/suppdata/ob/b3/b306473p/