MAGL inhibitor 1,1,1,3,3,3-hexafluoropropan-2-yl 4- (2- (pyrrolidin-1-yl) -4- (trifluoromethyl) benzyl) piperazine -1-carboxylate is described herein, including its crystalline form, and its pharmaceutically acceptable salts and solvates.MAGL 억제제인 1,1,1,3,3,3-헥사플루오로프로판-2-일 4-(2-(피롤리딘-1-일)-4-(트리플루오로메틸)벤질)피페라진-1-카르복실레이트를, 그의 결정형과, 약학적으로 허용 가능한 염 및 용매화물을 포함하여 본원에서 설명한다.