N,N,N',N'-Tetramethyl-O-(N-succinimidyl)uronium hexafluorophosphate (CAS NO.265651-18-1) is also named as 4,4'-Dimethyloctafluorobiphenyl ; HSTU ; O-(N-Succinimidyl)-N,N,N',N'-tetramethyluronium hexafluorophosphate .