Cholinesterase Inhibitors from the Aerial Part of Piper hymenophyllum

Centre of Pharmaceutical Research-Training, Vietnam Military Medical University, 160 Phung Hung, Hadong, Hanoi, Vietnam College of Pharmacy, Catholic University of Daegu, Gyeongbuk 712-702, Korea. E-mail: bsmin@cu.ac.kr Institute of Natural Products Chemistry, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Caugiay, Hanoi, Vietnam Deparment of Pharmacognosy, Hanoi University of Pharmacy, 15 Le Thanh Tong, Hoankiem, Hanoi, Vietnam Faculty of Food Science and Biotechnology, Pukyung National University, Busan 608-737, Korea College of Pharmacy, Kyungpook National University, Daegu 702-701, Korea Received November 14, 2013, Accepted November 27, 2013