303D:
reference: Designer DNA-binding drugs: the crystal structure of a meta-hydroxy analogue of Hoechst 33258 bound to d(CGCGAATTCGCG)2., Clark GR, Squire CJ, Gray EJ, Leupin W, Neidle S, Nucleic Acids Res 1996 Dec 15;24(24):4882-9. PMID: 9017011

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