<chemical> 1-(2-(4-(3,4-dihydro-6-methoxy-2-phenyl-1-naphthyl)phenoxy)ethyl)pyrrolidine. An oestrogen antagonist that has been used in the treatment of breast cancer. ... Pharmacological action: antineoplastic agent, hormonal, oestrogen antagonists. ... Chemical name: Pyrrolidine, 1-(2-(4-(3,4-dihydro-6-methoxy-2-phenyl-1-naphthalenyl)phenoxy...