| Autor: |
Adizov SM; S. Yunusov Institute of the Chemistry of Plant Substances, Academy of Sciences of Uzbekistan, Mirzo Ulugbek Str. 77, Tashkent 100170, Uzbekistan., Mukhamathanova RF, Turgunov KK, Sham'yanov ID, Tashkhodjaev B |
| Jazyk: |
angličtina |
| Zdroj: |
Acta crystallographica. Section E, Structure reports online [Acta Crystallogr Sect E Struct Rep Online] 2013 Mar 23; Vol. 69 (Pt 4), pp. o578. Date of Electronic Publication: 2013 Mar 23 (Print Publication: 2013). |
| DOI: |
10.1107/S1600536813007381 |
| Abstrakt: |
The title compound, C18H16O8, was isolated from the plant Artemisia baldshuanica Krasch et Zarp. The mol-ecule is approximately planar, with the exception of the terminal methyl groups, the C atoms of which devitate from their attached ring planes by 1.243 (5) and 1.168 (5) Å. The dihedral angle between the substituted benzopyran and benzene rings is 5.8 (1)°; this near planarity could be due to conjugation or a packing effect. Intra-molecular O-H⋯O and C-H⋯O hydrogen bonds occur. In the crystal, mol-ecules are connected by O-H⋯O hydrogen bonds involving the hy-droxy and carbonyl groups, forming hydrogen-bonded chains along [001] and [1-10]. The chains are linked by C-H⋯O inter-actions. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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