title: Complete assignments of 1H and 13C NMR data for seven arylnaphthalide lignans from Justicia procumbens.
abstract: Three new arylnaphthalide lignans named 6'-hydroxy justicidin A (1), 6'-hydroxy justicidin B (2) and 6'-hydroxy justicidin C (3) have been isolated from the whole plant of Justicia procumbens, together with four known ones, neojusticin A (4), chinensinaphthol methyl ester (5), isodiphyllin (6) and taiwanin C (7). The complete assignments of 1H and 13C NMR chemical shifts for the new lignans and the 13C NMR chemical shifts for the known lignans were obtained for the first time by means of 2D NMR techniques, including HSQC and HMBC.
authors.affiliation: Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100094, P.R. China.
authors.forename: Meihua
authors.initials: M
authors.lastname: Yang
authors.forename: Jun
authors.initials: J
authors.lastname: Wu
authors.forename: Fan
authors.initials: F
authors.lastname: Cheng
authors.forename: Yuan
authors.initials: Y
authors.lastname: Zhou
mesh_terms: D027901:Acanthaceae / Q000737:chemistry*; D004148:Dioxolanes / Q000302:isolation & purification*; D017705:Lignans / Q000302:isolation & purification*; D009682:Magnetic Resonance Spectroscopy; D008516:Medicine, Chinese Traditional; D015394:Molecular Structure; D009281:Naphthalenes / Q000302:isolation & purification*
chemical_list: D004148:Dioxolanes; D017705:Lignans; D009281:Naphthalenes; C049719:justicidins