PIPERAZINES Ⅰ.SYNTHESES OF ALKYL 1-METHYL-PIPERAZINE-4-DITHIOCARBAMATE CITRATES AND 1-METHYL-4-ARYL-THIOCARBAMYL-PIPERAZINE CITRATES
WEN KUANG-LING, TUNG YEONG-MING, SOONG HONG-TSIANG, CHANG CHI-CHIEK
Acta Chimica Sinica . 1956, (5): 379 -385 .