4MEH:
reference: An in vitro evolved glmS ribozyme has the wild-type fold but loses coenzyme dependence., Lau MW, Ferre-D'Amare AR, Nat Chem Biol. 2013 Oct 6. doi: 10.1038/nchembio.1360. PMID: 24096303

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