2-Methylpiperidin-4-one hydrochloride13729-77-630 % similar 1-Methyl-4-(piperazin-1-yl)piperazine hydrochloride436099-90-030 % similar Tetrt-butyl5-methyl-1,4-diazepane-1-carboxylate194032-42-330 % similar 1-(1-Methyl-4-piperidinyl)piperazine23995-88-230 % similar 1-(Butan-2-yl)piperazine34581-21-030 % similar 4-(Piperidin-4-yl)morpholine53617-35-930 % similar