Enclomiphene D4hydrochloride ((E)-Clomiphene D4hydrochloride; trans-Clomiphene D4hydrochloride; EnclomifeneD4hydrochloride) is a potent and orally active oestrogen receptor antagonist, with antioestrogenic property.Enclomiphene D4hydrochloride ((E)-Clomiphene D4hydrochloride; trans-Clomiphene D4hydrochloride; EnclomifeneD4hydrochloride) is a deuterium labeled Enclomiphene.