ACHE and Alzheimer disease: Our search for plant raw materials for medicinal products is now aimed at investigating the acetylcholinesterase inhibitory activity (AChE) of basic chloroform extracts (BCE) obtained from Habranthus jamesonii, Phycella herbertiana, Rhodophiala mendocina, and Zephyranthes filifolia (Amaryllidaceae species that grow in Argentine) to find new sources of production of galanthamine, and other potential alkaloids for treating AD.