3-Piperidinol
 3-Hydroxypiperidine hydrochloride
 4-Hydroxypiperidine
 1-Benzylpiperidin-3-olhydrochlorid
 1-Benzyl-3-hydroxypiperidine
 N-Boc-4-piperidinol
 1-Boc-piperidine-4-carboxylic acid
 3-Piperidinemethanol
 4-Piperidinemethanol
 N-Boc-piperidine-3-methanol
 N-Boc-4-piperidinemethanol
 L-Pipecolic acid
 D(+)-Pipecolinicacid
 1-Methyl-3-piperidinemethanol
 Ethyl-3-piperidine Carboxylate
 3-Piperdine carboxamide
 4-Piperidine carboxamide
 Isonipecotic acid
 Ethyl nicotinate
 Ethyl isonicotinate
 methyl pyridine-4-carboxylate
 3-Pyridinemethanol 
 3-Pyridinecarboxaldehyde
 tert-Butyl 1-piperazinecarboxylate
 Piperazine-2-carboxylic acid dihydrochloride
 1-Methylpiperazine dihydrochloride
 4-Methyl-1-piperazinecarbonyl chloride hydrochloride
 R-(-)-2-Methylpiperazine
 (S)-(+)-2-Methylpiperazine
 1-Methylpiperazine
 2-Methylpiperazine
 4-Methylpierazine-1-carbonylchloride
 1-Piperazinecarbaldehyde
 1,4-Piperazinedicarbaldehyde
 4,4¡ä-difluorobenzophenone
 4,4-Difluorobenzhydrol
 Rofecoxib
 3-Chlorotoluene
 (R)-(+)-alpha,alpha-Diphenyl-2-pyrrolidinemethanol
 (S)-Diphenylprolinol
 1-bromo-4-n-hexadecylbenzene
 N4-benzoylcytosine
 Ethoxymethylenemalononitrile
 4-(Aminomethyl)benzoic acid
 Tranexamic acid
 Forchlorfenuron
 indole-3-carboxylic acid
 ndole-3-acetic acid
 4-Fluorophenoxyacetic acid
 (4-chlorophenoxy)acetic acid