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Tryptanthrin is one of the most important members of indoloquinoline alkaloids. We obtained this alkaloid from  Isatis . Two novel Fe II  and Co II  complexes of tryptanthrin were first synthesized. Single-crystal X-ray diffraction analyses show that these complexes display distorted four-coordinated tetrahedron geometry via two heterocyclic nitrogen and oxygen atoms from tryptanthrin ligand. Binding with G-quadruplex DNA properties revealed that both complexes were found to exhibit significant interaction with G-quadruplex DNA. This study may potentially serve as the basis of future rational design of metal-based drugs from natural products that target the G-quadruplex DNA.

bioinorganic chemistry and applications/bioinorganic chemistry and applications

Novel<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M1"><mml:mrow><mml:msup><mml:mrow><mml:mtext>Fe</mml:mtext></mml:mrow><mml:mrow><mml:mtext>II</mml:mtext></mml:mrow></mml:msup></mml:mrow></mml:math>and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M2"><mml:mrow><mml:msup><mml:mrow><mml:mtext>Co</mml:mtext></mml:mrow><mml:mrow><mml:mtext>II</mml:mtext></mml:mrow></mml:msup></mml:mrow></mml:math>Complexes of Natural Product Tryptanthrin: Synthesis and Binding with G…

NovelFeIIandCoIIComplexes of Natural Product Tryptanthrin: Synthesis and Binding with G…