RBC6 is an inhibitor of GTPases RalA. RBC6 inhibits binding of Ral to its effector RALBP1. RBC6 also inhibits Ral-mediated cell spreading of murine embryonic fibroblasts, as well as anchorage-independent growth of human cancer celllines.
References:
[1]. Yan C, et al. Discovery and characterization of small molecules that target the GTPase Ral. Nature. 2014 Nov 20;515(7527):443-7.