1-cyclopenta-2,4-dien-1-ylidene-N,N,N',N'-tetramethylmethanediamine

2-hexyl-1,1,3,3-tetramethylguanidine

1,1,3,3-tetramethyl-2-octylguanidine

2-(3-chlorophenyl)-1,1,3,3-tetramethylguanidine

1,8-双(四甲基胍基)萘