title: Lupane triterpenes with a δ-lactone at ring E, from Lippia mexicana.
authors.affiliation: Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria, Coyoacán, 04510, DF, México. emmaldon@servidor.unam.mx
authors.forename: Emma
authors.initials: E
authors.lastname: Maldonado
authors.forename: Humberto
authors.initials: H
authors.lastname: Díaz-Arumir
authors.forename: R Alfredo
authors.initials: RA
authors.lastname: Toscano
authors.forename: Mahinda
authors.initials: M
authors.lastname: Martínez