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The title compound, C18H16O8, was isolated from the plant Artemisia baldshuanica Krasch et Zarp. The molecule 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. Intramolecular O—H
O and C—HO hydrogen bonds occur. In the crystal, molecules are connected by O—HO hydrogen bonds involving the hydroxy and carbonyl groups, forming hydrogen-bonded chains along [001] and [1-10]. The chains are linked by C—HO interactions.
O and C—HO hydrogen bonds occur. In the crystal, molecules are connected by O—HO hydrogen bonds involving the hydroxy and carbonyl groups, forming hydrogen-bonded chains along [001] and [1-10]. The chains are linked by C—HO interactions.organic compoundsOpen access
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The title compound, C19H20N2O·C2H5OH, is an ethanol solvate of an indol alkaloid which was extracted from the plant Vinca erecta. The fused piperidine ring adopts an approximate boat conformation and the pyrrolidine ring an envelope conformation with one of the methylene C atoms at the flap. An intramolecular N—HO hydrogen bond forms an S6 ring motif. In the crystal, norfulorocurarine and ethanol molecules are linked into a chain along the c-axis direction through N—HO and O—HN hydrogen bonds.
O hydrogen bond forms an S6 ring motif. In the crystal, norfulorocurarine and ethanol molecules are linked into a chain along the c-axis direction through N—HO and O—HN hydrogen bonds.
