O-(Benzotriazol-1-yl)-N,N,N′,N′-tetramethyluronium tetrafluoroborate125700-67-6100 % similar 1-(Bis(dimethylamino)methylene)-1H-benzotriazolium hexafluorophosphate(1-) 3-oxide94790-37-179 % similar TCTU330641-16-272 % similar HCTU330645-87-957 % similar HATU148893-10-156 % similar N,N,N',N'-Tetramethyl-S-(1-oxido-2-pyridyl)thiouronium Tetrafluoroborate255825-38-841 % similar 2-(2-Pyridon-1-yl)-1,1,3,3-tetramethyluronium tetrafluoroborate125700-71-236 % similar 2-(7-Azabenzotriazole-1-yl)-1,1,3,3-tetramethyluronium tetrafluoroborate873798-09-535 % similar N,N,N',N'-Tetramethyl-O-(3,4-dihydro-4-oxo-1,2,3-benzotriazin-3-yl)uronium tetrafluoroborate125700-69-834 % similar