56602-32-5 56602-33-6 Benzotriazol-1-yloxy-tris(dimethylamino)phosphonium Benzotriazol-1-yloxy-tris(dimethylamino)phosphonium hexafluorophosphate Benzotriazol-1-yloxy-tris(dimethylamino)phosphonium tetrafluoroborate Bop reagent Btzo-tdmap Phosphorus(1+), (1H-benzotriazol-1-olato-O)tris(N-methylmethanaminato)-, (T-4)-