(E)-GW7604 is the (E)-isomer of GW7604, an antiestrogen and a metabolite of GW5638 (HY-112746), which is a high-affinity estrogen receptor (ER) antagonist[1].
References
[1] Willson TM, et al. Dissection of the molecular mechanism of action of GW5638, a novel estrogen receptor ligand, provides insights into the role of estrogen receptor in bone. Endocrinology. 1997 Sep;138(9):3901-11. DOI:10.1210/endo.138.9.5358
