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In the title macrocyclic compound, 3,10,18,25,31,32-hexa­aza­penta­cyclo­[25.3.1.112,16.04,9.019,24]dotri­conta-1(30),4,6,8,12,14,-16(32),19,21,23,27(31),28-dodecaene-2,11,17,26-tetrone dimethyl­formamide solvate, C26H18N6O4·C3H7NO, the two pyridine rings are approximately perpendicular to each other, the dihedral angle between them being 82.1 (1)°. The macrocycle possesses mirror symmetry. The dihedral angle between the two benzene rings is 119.6 (1)°.

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The title compound, C28H46O2, was isolated from soft coral (Nephthea sp.) collected from Yongxing island of the Xisha archipelago in the South China Sea and its crystal structure has been determined. In the crystal structure, inter­molecular O—H...O hydrogen-bond inter­actions link the mol­ecules into extended ribbons parallel to the a axis.
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