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Piperazine, 1-(dimethoxymethyl)-

O-cymene-7-carbonitrile (6ci,7ci)

Piperazine, 1-(dimethoxymethyl)-4-ethyl-(9ci)

Piperazine, 1-(ethenylsulfonyl)-(9ci)

Piperazine, 1-(ethoxyacetyl)-(9ci)

Piperazine, 1-(ethylsulfonyl)-4-[[4-(trifluoromethyl)phenyl]sulfonyl]-(9ci)

Piperazine, 1-(fluoroacetyl)-4-(3-methyl-2-butenyl)-(9ci)

Piperazine, 1-(fluoroacetyl)-4-methyl-(9ci)

Piperazine, 1-(hydroxyacetyl)-4-methyl-(9ci)

O-phenylenediamine, 3,6-di-tert-butyl-(8ci)