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1,7-Dihydr-oxy-2,3,4-trimeth-oxy-9H-xanthen-9-one monohydrate from Halenia elliptica.

ABSTRACT: The title compound, C(16)H(14)O(7)·H(2)O, possesses a planar three-ring skeleton; its carbonyl, one of the two hydroxy and two of the three methoxy O atoms and the water mol-ecule form hydrogen bonds, giving rise to a layer structure.

SUBMITTER: Yu P

PROVIDER: S-EPMC2960944 | biostudies-literature |

REPOSITORIES: biostudies-literature

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2,4,5-Trimeth-oxy-benzaldehyde monohydrate.

Project description:In the title compound, C(10)H(12)O(4)·H(2)O, the 2,4,5-trimeth-oxy-benzaldehyde mol-ecule is almost planar (rms deviation = 0.0183?Å). There is an R(1) (2)(5) ring motif due to O-H?O hydrogen bonding. In the crystal, the mol-ecules are stabilized in the form of one-dimensional polymeric chains extending along [010] due to O-H?O hydrogen bonding with adjacent water mol-ecules. The H atoms involved in inter-molecular hydrogen bonding are disordered over two sets of sites of equal occupancy.

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(E)-2-Meth-oxy-9-(2-meth-oxy-9H-xanthen-9-yl-idene)-9H-xanthene.

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(E)-N-(2,3,4-Trimeth-oxy-6-methyl-benzyl-idene)aniline.

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(1E,2E)-1,2-Bis(2,3,4-trimeth-oxy-benzyl-idene)hydrazine.

Project description:The title compound, C(20)H(24)N(2)O(6), was obtained as an unexpected product by the reaction of hydrazinium dithio-carbazate with 2,3,4-trimeth-oxy-benzaldehyde in refluxing ethanol. The mol-ecule lies on a center of inversion. The crystal packing is stabilized by weak inter-molecular C-H?O inter-actions.

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4-(2,3,4-Trimeth-oxy-6-methyl-benzyl-idene-amino)phenol.

Project description:The asymmetric unit of the title compound, C(17)H(19)NO(4), contains two independent mol-ecules in which the dihedral angles between the two benzene rings are 83.1?(2) and 88.5?(2)°. Each mol-ecule adopts a trans configuration with respect to the C=N bond. In the crystal structure, mol-ecules are linked by inter-molecular O-H?N hydrogen bonds, forming two independent one-dimensional chains running along the b-axis direction.

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1,3-Dihydr-oxy-2-methoxy-methyl-9,10-anthraquinone from Rennellia elliptica Korth.

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Halenia elliptica

Project description:Halenia elliptica overview

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(E)-4-Methyl-N-(2,3,4-trimeth-oxy-6-methyl-benzyl-idene)aniline.

Project description:In the title mol-ecule, C(18)H(21)NO(3), the dihedral angle between the two benzene rings is 42.2?(2)° and it adopts a trans configuration with respect to the central C=N bond.

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