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A	B	C	D	E	F
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M	N	O	P	Q	R
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1-N-Boc-3-isopropylpiperazine

(S)-1-N-Boc-2-butylpiperazine

1-N-Boc-2-isobutylpiperazine

1-N-Boc-2-butylpiperazine

1-Boc-2-(hydroxymethyl)piperazine

(S)-1-Boc-3-ethylpiperazine

(S)-1-Boc-3-propylpiperazine

(R)-1-Boc-3-propylpiperazine

1-Boc-3-propylpiperazine

1-N-Boc-3-butylpiperazine