organic compounds
Osajin [systematic name: 5-hydroxy-3-(3-hydroxyphenyl)-8,8-dimethyl-6-(3-methylbut-2-enyl)-4H,8H-pyrano[2,3-h]chromen-4-one, C25H24O5, crystallizes with two independent molecules in the asymmetric unit. The benzopyranone ring system is nearly planar in both molecules and they differ significantly only in the orientation of the benzene rings, which are rotated by 56.27 (7) and 44.16 (7)° with respect to the benzopyranone systems. In the crystal structure, intermolecular O—HO hydrogen bonds link the molecules into dimers.
organic compounds
The title compound, C11H15NO2, contains a planar diethylamine group with an sp2-hybridized N atom bonded to a nearly planar salicylaldehyde fragment. Electron density from the diethylamine group is transferred to a pseudo-ring formed by an intramolecular O—HO hydrogen bond involving the aldehyde and hydroxy groups. In the crystal structure, the molecules form C—HO hydrogen-bonded centrosymmetric dimers.