Receptor. GW 9508, A potent and selective agonist for the free fatty acid receptor FFA1 (GPR40), 100-fold selective against GPR120, Purity: G98% by HPLC, CAS Number: 885101-89-3, Molecular Formula: C22H21NO3, Appearance: Beige solid, Storage: -20 Degree C, Size: 50g