Publications by authors named "Dagmar Vesela"
The major constituents of fruits of Maclura pomifera are the prenylated isoflavones, osajin (1) and pomiferin (2). Since significant biological activities of extracts from the wood of M. pomifera were previously reported, the peroxynitrite scavenging activity, inhibition of lipid peroxidation, scavenging of DPPH and EROD activity of these two major substances were studied.
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- The crystal structure of pomiferin, a compound with the formula C(25)H(24)O(6), has been elucidated, revealing its molecular arrangement.
- The benzopyranone ring system in pomiferin is almost flat, with a dihedral angle of 40.85 degrees between the phenyl ring and the benzopyranone part.
- The stability of the crystal structure is attributed to a one-dimensional chain of hydrogen bonds involving oxygen atoms, with O...O distances measured between 2.5546 and 2.7999 angstroms.
Dracophane, a novel structural derivative of metacyclophane, was isolated from the resin of Dracaena cinnabari Balf. The structure of this compound was determined by spectroscopic methods to be 3,12,21-trihydroxy-1,10,19-tris(4-hydroxyphenyl)-5,14,23-trimethoxy[3.3.
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