title: 14-Angeloyloxycacalohastine from Psacalium peltatum.
abstract: THE TITLE COMPOUND [SYSTEMATIC NAME: (9-meth-oxy-3,5-dimethyl-5,6-dihydro-naphtho-[2,3-b]furan-4-yl)methyl 2-meth-yl-but-2-enoate], C(21)H(24)O(4), was isolated from matarique, or Psacalium peltatum (Kunth). The structure is almost planar. The angelo-yloxy group makes an angle of 62.08 (2)° with the furan-oeremophilane skeleton. The carbonyl O atom is disordered between two positions with a 76:24 ratio. The mol-ecules in the crystal are joined by very weak C-H-O inter-actions in the ac plane.
authors.affiliation: Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria, México, DF 04510,  Mexico.
authors.forename: Nadia
authors.initials: N
authors.lastname: Rojano-Vilchis
authors.forename: Simón
authors.initials: S
authors.lastname: Hernández-Ortega
authors.forename: Manuel
authors.initials: M
authors.lastname: Jimenez-Estrada
authors.forename: Armando
authors.initials: A
authors.lastname: Torres Avilez