title: Absolute configurations of new limonoids from a Krishna mangrove, Xylocarpus granatum.
abstract: Four new limonoids, named granatumins V-Y (1-4), belonging to the small group of limonoids with a C1-C29 oxygen bridge and a ∆(8,30) double bond, were isolated from the seeds of an Indian mangrove, Xylocarpus granatum, collected in the swamp of Krishna estuary, Andhra Pradesh. The constitutions and absolute configurations of these compounds were established by extensive NMR investigations, single-crystal X-ray crystallography using Cu Kα radiation, and by the comparison of circular dichroism spectrum.
authors: Key Laboratory of Marine Bio-resources Sustainable Utilization, South China Sea Institute of Oceanology, Chinese Academy of Sciences, 164 West Xingang Road, Guangzhou 510301, PR China; University of Chinese Academy of Sciences, 19 Yuquan Road, Beijing 100049, PR China.
authors: Wenping
authors: W
authors: Chen
authors: Marine Drugs Research Center, College of Pharmacy, Jinan University, 601 Huangpu Avenue West, Guangzhou 510632, PR China.
authors: Li
authors: L
authors: Shen
authors: Marine Drugs Research Center, College of Pharmacy, Jinan University, 601 Huangpu Avenue West, Guangzhou 510632, PR China. Electronic address: minyi.li@gmail.com.
authors: Minyi
authors: M
authors: Li
authors: Institute of Organic Chemistry, Jiangxi Science & Technology Normal University, Nanchang 330013, PR China.
authors: Qiang
authors: Q
authors: Xiao
authors: Government Degree College at Amadala valasa, Srikakulam District, Andhra Pradesh 532185, India.
authors: Tirumani
authors: T
authors: Satyanandamurty
authors: Marine Drugs Research Center, College of Pharmacy, Jinan University, 601 Huangpu Avenue West, Guangzhou 510632, PR China. Electronic address: wwujun2003@yahoo.com.
authors: Jun
authors: J
authors: Wu
mesh_terms: D002942:Circular Dichroism; D018360:Crystallography, X-Ray; D036701:Limonins / Q000737:chemistry* / Q000302:isolation & purification; D009682:Magnetic Resonance Spectroscopy; D029582:Meliaceae / Q000737:chemistry*; D015394:Molecular Structure; D010936:Plant Extracts / Q000737:chemistry* / Q000302:isolation & purification; D012639:Seeds / Q000737:chemistry
chemical_list: D036701:Limonins; D010936:Plant Extracts
keywords: Absolute configuration; Limonoids; Mangrove; Structure elucidation; Xylocarpus granatum