caa a22 4500 46904957X CHVBK 20180323132826.0 cr unu---uuuuu 170328e19920301xx s 000 0 eng 10.1007/BF02973984 doi (NATIONALLICENCE)springer-10.1007/BF02973984 Constituents of Paulownia tomentosa stem (III): The crystal structure of methyl 5-hydroxy-dinaphtho [1,2-2′,3′] furan-7, 12-dione-6-carboxylate [Elektronische Daten] [Il Park, Bak-Kwang Kim, Yang Kim] The molecular structure of a natural compound was determined by single crystal X-ray diffraction analysis. The compound was isolated by methanol extraction and repeated chromatography from the stem ofPaulownia tomentosa. Yellow prismatic crystals of the compound, which were recrystallized from tetrahydrofuran, are triclinic, witha=7.310(6),b=10.753(6),c=11.586(5) Å, α=93.30(6), β=105.62(10), γ=109.49(7)°,D x =1.514,D m =1.51 g/cm3, space group $$P\bar 1$$ andZ=2. The structure was solved by direct method, and refined by least-squares procedure to the finalR-value of 0.032 for 1271 independent reflections (F≤3σ(F)). The compound is one of new furanquinone analogue. The molecule has a nearly planar conformation with an intramolecular hydrogen bond. In the crystal, the planar molecules are arranged as a parallel sheet-like pattern, and these stackings are stabilized by the O-H O type intermolecular hydrogen bonds. The other intermolecular contacts appear to be the normalvan der Waals interactions. The Pharmaceutical Society of Korea, 1992 Crystal structure nationallicence Paulownia tomentosa nationallicence furanquinone derivative nationallicence X-ray crystallography nationallicence Park Il College of Pharmacy, Seoul National University, 151-742, Seoul, Korea aut Kim Bak-Kwang College of Pharmacy, Seoul National University, 151-742, Seoul, Korea aut Kim Yang College of Pharmacy, Seoul National University, 151-742, Seoul, Korea aut Archives of Pharmacal Research Pharmaceutical Society of Korea 15/1(1992-03-01), 52-57 0253-6269 15:1<52 1992 15 12272 https://doi.org/10.1007/BF02973984 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02973984 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Park Il College of Pharmacy, Seoul National University, 151-742, Seoul, Korea aut NATIONALLICENCE 700 1- Kim Bak-Kwang College of Pharmacy, Seoul National University, 151-742, Seoul, Korea aut NATIONALLICENCE 700 1- Kim Yang College of Pharmacy, Seoul National University, 151-742, Seoul, Korea aut NATIONALLICENCE 773 0- Archives of Pharmacal Research Pharmaceutical Society of Korea 15/1(1992-03-01), 52-57 0253-6269 15:1<52 1992 15 12272 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer