RyR1-selective inhibitor 1，5MG，SML3308-5MG，Sigma

Biochem/physiol Actions

Potent and selective inhibitor of the type 1 ryanodine receptor (RyR1)
RyR1-selective inhibitor 1 (6,7-(methylenedioxy)-1-octyl-4-quinolone-3-carboxylic acid) potently and selectively inhibits the type 1 ryanodine receptor (RyR1). It prevents and treats malignant hyperthermia and heat stroke in several mouse models. RyR1-selective inhibitor 1 decreases resting intracellular Ca2+, inhibits halothane- and isoflurane-induced Ca2+ release, and suppresses caffeine-induced contracture in skeletal muscle.