Plant Sciences & Plant Pathology

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3-Carbamoylquinoxalin-1-ium chloride
(2011-12) Harper, James K.; Strobel, Gary A.; Arif, Atta M.
The title compound, C9H8N3O+·Cl-, was isolated from a liquid culture of streptomyces sp. In the cation, the ring system makes a dihedral angle of 0.2 (2)° with the amide group. The protonation creating the cation occurs at ome of the N atoms in the quinoxaline ring system. In the crystal, the ions are linked through N-H...O and N-H...Cl hydrogen bonds, forming a two-dimensional network parallel to (10\overline{3}).
(6 S *)-6-[(1 S *,2 R *)-1,2-Dihydroxypentyl]-4-methoxy-5,6-dihydro-2 H -pyran-2-one
(2013-10) Valenti, Domenic J.; Arif, Atta M.; Strobel, Gary A.; Harper, James K.
The title compound, C11H18O5, was isolated from a liquid culture of Pestalotiopsis sp. In the molecule, the pyran-2-one ring assumes a half-chair conformation. The two terminal C atoms of the pentyl group were refined as disordered over two sets of sites, with refined occupancies of 0.881 (10) and 0.119 (10). In the crystal, molecules are linked via O-H...O hydrogen bonds forming a three-dimensional network.