title: Two new minor cyclopeptides from Sagina japonica (Caryophyllaceae).
abstract: Two new minor cyclopeptides, named japonicin A (1), japonicin B (2), were isolated from the whole plants of Sagina japonica (Caryophyllaceae). Their structures were determined as cyclo-(Pro(1)-Pro(2)-Leu(2)-Leu(1)-Phe(2)-Pro(3)-Gly-Ser-Phe(1)) (1) and cyclo-(Pro(1)-Ile-Tyr-Asp-Pro(2)-Phe(2)-Pro(3)-Phe(1)) (2) on the basis of spectroscopic data, especially by two-dimension NMR technologies.
authors.affiliation: School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210014, Jiangsu, China.
authors.forename: Ai-qun
authors.initials: AQ
authors.lastname: Jia
authors.forename: Ning-hua
authors.initials: NH
authors.lastname: Tan
authors.forename: Jun
authors.initials: J
authors.lastname: Zhou
mesh_terms: D000595:Amino Acid Sequence; D029748:Caryophyllaceae / Q000737:chemistry*; D015394:Molecular Structure; D010456:Peptides, Cyclic / Q000737:chemistry / Q000302:isolation & purification*; D010936:Plant Extracts / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: D010456:Peptides, Cyclic; D010936:Plant Extracts; C553847:japonicin A; C553848:japonicin B