GSK-J1 (Free acid) 1MG. GSK-J1 (Free acid), CAS: 1373422-53-7, MF: C22H23N5O2, MW: 398. 45, Purity: greater than or equal to 98% by TLC, Appearance: Pale yellow solid, Synonym: N-[2-(2-Pyridinyl)-6-(1, 2, 4, 5-tetrahydro-3H-3-benzazepin-3-yl)-4-pyrimidinyl]-B-alanine, Size: 1MG