HATU148893-10-1100 % similar 1-(Bis(dimethylamino)methylene)-1H-benzotriazolium hexafluorophosphate(1-) 3-oxide94790-37-171 % similar HCTU330645-87-959 % similar O-(Benzotriazol-1-yl)-N,N,N′,N′-tetramethyluronium tetrafluoroborate125700-67-656 % similar TCTU330641-16-247 % similar N,N,N',N'-Tetramethyl-S-(1-oxido-2-pyridyl)thiuronium hexafluorophosphate212333-72-737 % similar 2-(7-Azabenzotriazole-1-yl)-1,1,3,3-tetramethyluronium tetrafluoroborate873798-09-532 % similar Hdbtu164861-52-331 % similar (7-Azabenzotriazol-1-yloxy)tris(dimethylamino)phosphonium Hexafluorophosphate156311-85-231 % similar Chloro-N,N,N',N'-tetramethylformamidinium Hexafluorophosphate94790-35-930 % similar