英文别名3-(Hydroxymethyl)hexanoic acid gamma-lactone; Brivaracetam Impurity 20; 2(3H)-Furanone, dihydro-4-propyl-; 4-propyldihydrofuran-2(3H)-one; 4-n-Propyl butyrolactone; Brivaracetam Impurity O; 4-propyltetrahydrofuran-2-one; 4-propyloxolan-2-one; 4-Propyl-dihydro-furan-2-on; 2(3H)-Furanone,dihydro-4-propyl; 4-n-propylbutyrolactone; 4-propyl-dihydro-furan-2-one 
