2,6-Dimethylpiperidines are chemical compounds with the formula C5H8(CH3)2NH. Three stereoisomers exist: the achiral (R,S)-isomer and the chiral (R,R)/(S,S) enantiomeric pair. Dimethylpiperidines are derivatives of the heterocycle piperidine, wherein two hydrogen atoms are replaced by methyl groups.

L-Leucyl-L-alanine is a dipeptide composed of L-leucine and L-alanine joined by a peptide linkage.

1-Methoxy PMS is stable electron-transport mediator between NAD(P)H and tetrazolium dyes, can induce active oxygen formation.