Optimization of synthesis of 4-dimetilamino benzalaseton by speed and duration variation of stirring using sodium hydroxide as catalyst - ., Sardjiman; Faculty of Pharmacy, Universitas Gadjah Mada Sekip Utara Yogyakarta, 55281. Phone: 0274-543120 Mobile Phone: 081931176803 (Faculty of Pharmacy Universitas Gadjah Mada, Yogyakarta, Skip Utara, 55281, Indonesia, 2007)