Justicia lignans VI--prostalidin D, a new arylnaphthalide lignan from Justicia diffusa var. prostrata C.B. Clarke.
A new arylnaphthalide lignan, prostalidin D (6) was isolated as a minor metabolite from Justicia diffusa var. prostrata. 6 contains a rare catechol unit and its structure was confirmed by total synthesis. In addition, seven known lignans, namely, justicidin E (7), helioxanthin (8), justicidin A (9), medioresinol dimethyl ether (10), medioresinol (11), lariciresinol (12) and 8-methoxyisolariciresinol (13) have also been isolated from the same source and identified by direct comparison with authentic samples.
Department of Chemistry, Sri Venkateswara University, Tirupati, India.
D
D
Rajasekhar
G V
GV
Subbaraju
K R
KR
Pillai
D007194:India; D017705:Lignans / Q000138:chemical synthesis / Q000737:chemistry* / Q000302:isolation & purification; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D009281:Naphthalenes / Q000138:chemical synthesis / Q000737:chemistry* / Q000302:isolation & purification; D010936:Plant Extracts / Q000032:analysis; D010946:Plants, Medicinal / Q000737:chemistry*; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet
D017705:Lignans; D009281:Naphthalenes; D010936:Plant Extracts; C426363:prostalidin D