p38α inhibitor 3 (Comp G7) is a p38α inhibitor that blocks the effectiveness of myoblast differentiation[1].
References:
[1]. Yael Friedmann, et al. JX401, A p38alpha inhibitor containing a 4-benzylpiperidine motif, identified via a novel screening system in yeast. Mol Pharmacol. 2006 Oct;70(4):1395-405.