5W7S:
reference: Unveiling sequential late-stage methyltransferase reactions in the meleagrin/oxaline biosynthetic pathway., Newmister SA, Romminger S, Schmidt JJ, Williams RM, Smith JL, Berlinck RGS, Sherman DH, Org Biomol Chem. 2018 Aug 24. doi: 10.1039/c8ob01565a. PMID: 30141817

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