6TTT:
reference: Small-Molecule Inhibitors of METTL3, the Major Human Epitranscriptomic Writer., Bedi RK, Huang D, Eberle SA, Wiedmer L, Sledz P, Caflisch A, ChemMedChem. 2020 May 6;15(9):744-748. doi: 10.1002/cmdc.202000011. Epub 2020 Mar, 23. PMID: 32159918

This OCA Structure page
uses Jmol, developed by the Jmol Development Team (documentation).