https://www.selleckchem.com/pr....oducts/Verteporfin(V
In the title compound, C10H4Cl2O3, a dichlorinated 3-formyl-chromone, the non-H atoms of the 4H-chromene ring are essentially coplanar (r.m.s. = 0.0188 Å), with the largest deviation from the least-squares plane [0.043 (2) Å] being for the pyran C=O C atom. The α,β-unsaturated carbonyl O atom deviates from the least-square plane by 0.124 (2) Å. The dihedral angle between the chromone and formyl least-square planes is 6.76 (3)°. In the crystal, mol-ecules are linked through C-H⋯O hydrogen bonds between the translation-symme
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