organic compounds
The title compound, C17H13NO3, a coumarin analog prepared from (E)-methyl 4-(4-methoxyphenyl)-2-oxobut-3-enoate and 2-aminophenol, has a planar conformation. Aromatic π-stacking interactions and C—HO hydrogen bonds stabilize the crystal structure.
organic compounds
The title compound, C10H14O4, is used to cure coughs and clear up phlegm and it is also used as an intermediate in the synthesis of other medicinal products. The entire molecule, except for atoms C10 and O4, is essentially planar (to within 0.001 Å).
organic compounds
In the title compound, C21H20O3·0.5H2O, the water molecule lies on a crystallographic twofold rotation axis. The cyclohexane ring adopts a twist–boat conformation and the cyclohexene ring is in an envelope conformation. In the crystal structure, the molecules are linked via strong O—HO intermolecular hydrogen bonds to form chains along the c axis.