1	PZE	Piperazine	1.000
2	XJJ	Piperazin-2-one	0.857
3	1FP	Piperazine-1-carbaldehyde	0.750
4	25R	2,5-dimethylpyrazine	0.750
5	CIG	2-amino-6-chloropyrazine	0.750
6	0PY	Pyridine	0.714
7	6LR	Morpholine	0.714
8	PIP	Piperidine	0.714