Acetylcholinesterase inhibitory activity of didehydrostemofoline, stemofoline alkaloids and extracts from Stemona collinsiae Craib roots

Sumet Kongkiatpaiboon^a, Piyanuch Rojsanga^b, Virote Pattarajinda^c, Wandee Gritsanapan^a,*

^aDepartment of Pharmacognosy, Faculty of Pharmacy, Mahidol University, 447 Sri-Ayutthaya Rd, Ratchathewi, Bangkok 10400, Thailand

^bDepartment of Pharmaceutical Chemistry, Faculty of Pharmacy, Mahidol University, Bangkok 10400, Thailand

^cDepartment of Animal Science, Faculty of Agriculture, Khon Kaen University, Khon Kaen 40002, Thailand