title: Seco diterpenoids from Excoecaria agallocha L.
abstract: Chemical examination of the ethyl acetate solubles of the CH(3)OH:CH(2)Cl(2) (1:1) extract of the roots of Excoecaria agallocha L. collected from Godavary estuary resulted in the isolation of three more new diterpenoids, agallochins M-O (1-3). The structures of the new diterpenoids were elucidated by a study of their physical and spectral data as methyl ent-13-epi-8,13-epoxy-4,6alpha-dihydroxy-3,4-secolabd-14-en-3-oate (1), methyl ent-13-epi-8,13-epoxy-2,3-secolabd-14-en-2,11-olid-3-oate (2), and methyl ent-17-hydroxy-3,4-secokaura-4(19),15-dien-3-oate (3).
authors.affiliation: School of Chemistry, Andhra University, Visakhapatnam-530 003, India. anjaneyuluasr@yahoo.com
authors.forename: Ammanamanchi S R
authors.initials: AS
authors.lastname: Anjaneyulu
authors.forename: Vadali Lakshmana
authors.initials: VL
authors.lastname: Rao
mesh_terms: D001578:Benzopyrans / Q000737:chemistry / Q000302:isolation & purification*; D004224:Diterpenes / Q000737:chemistry / Q000302:isolation & purification*; D019665:Euphorbiaceae / Q000737:chemistry*; D007194:India; D007783:Lactones / Q000737:chemistry / Q000302:isolation & purification*; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D018517:Plant Roots / Q000737:chemistry
chemical_list: D001578:Benzopyrans; D004224:Diterpenes; D007783:Lactones; C472939:methyl 17-hydroxy-3,4-secokaura-4(19),15-dien-3-oate; C472938:methyl 8,13-epoxy-2,3-secolabd-14-en-2,11-olid-3-oate; C472937:methyl 8,13-epoxy-4,6-dihydroxy-3,4-secolabd-14-en-3-oate