2,2-Dimethylpyrrolidine hydrochloride623580-01-884 % similar 2,2,6,6-Tetramethylpiperidine768-66-150 % similar 2-Methyl-L-proline42856-71-337 % similar 3,3-Dimethylpiperidine1193-12-036 % similar N,N′-Di-tert-butylethylenediamine4062-60-633 % similar 4,4-Dimethyloxazolidine51200-87-432 % similar N,N′-Bis(2,2,6,6-tetramethyl-4-piperidinyl)-1,6-hexanediamine61260-55-731 % similar