.gamma.-(2,4,5-Trichlorophenoxy)butyric acid 2,4,5-T Butyric acid 2,4,5-TB 4-(2,4,5-Trichlorophenoxy)butyric acid 93-80-1 Butanoic acid, 4-(2,4,5-trichlorophenoxy)- Butyric acid, 4-(2,4,5-trichlorophenoxy)- NSC102787 WLN: QV3OR BG DG EG