 These findings suggest that CTA is not an effective antigonadotropin.Chlorotrianisene, also known as tri-"p"-anisylchloroethylene (TACE) or as tris("p"-methoxyphenyl)chloroethylene, is a synthetic nonsteroidal compound of the triphenylethylene group.It is structurally related to the nonsteroidal estrogen diethylstilbestrol and to the SERMs clomifene and tamoxifen.