N-(2-Bromoethyl-d4)phthalimide is the labeled analogue of N-(2-Bromoethyl)phthalimide (B683975), a building block that has been used as a reactant for the preparation of β-Cyclodextrin derivatives. N-(2-Bromoethyl-d4)phthalimide is an intermediate in the synthesis of (E)-Fluvoxamine-d4 Maleate (F603503), the labeled analogue of (E)-Fluvoxamine Maleate (F603500), a selective serotonin reuptake inhibitor (SSRI) used as an anti-depressant. Antiobsessional.