EnclomipheneD4hydrochloride ((E)-ClomipheneD4hydrochloride; trans-ClomipheneD4hydrochloride; Enclomifene D4hydrochloride) is a potent and orally active oestrogen receptor antagonist, with antioestrogenic property.EnclomipheneD4hydrochloride ((E)-ClomipheneD4hydrochloride; trans-ClomipheneD4hydrochloride; Enclomifene D4hydrochloride) is a deuterium labeled Enclomiphene.