1,2-Diphenyl-1-(4-hydroxyphenyl)but-1-ene 1-(4-Hydroxyphenyl)-1,2-diphenyl-1-butene 1-Hpdpb 4-(1,2-Diphenyl-1-butenyl)phenol 68684-63-9 ICI 77949 Phenol, 4-(1,2-diphenyl-1-butenyl)- Tamoxifen metabolite E