An orally bioavailable skeletal muscle relaxant; inhibits the ability of mice to remain on a vertical ladder for 1 minute (ED50 = 15 mg/kg) and decreases forelimb grip strength by 35.9% (500 mg/kg); abolishes femoral nerve-stimulated polysynaptic reflex contractions of the cat tibialis anterior muscle and prolongs the mean refractory period of directly or indirectly stimulated skeletal muscle (200 mg/kg); inhibits human CAI over CAII (IC50s = 70 and ~80,000 μM, respectively),