SEARCH Articles Figures Tables Adding Additional Rings to the Carbohydrate Core Access via (SPIRO) Annulation Domino Processes Annulation Michael ring closure Annulation for five-membered rings Annulation reaction ring current Annulation ring-closing metathesis Annulations disrotatory ring closure Cycloaddition/annulation five-membered rings Cycloalkanones, ring annulation Cyclopentane ring system annulation Eight-membered ring annulation Formation of Eight-Membered Ring Systems by Annulation Key Oxa-Annulation and the D-Ring Atropisomerism Nucleophilic Cyclizations with Annulated Fluorinated Heterocyclic Rings Ring Synthesis by Annulation Ring systems annulation Ring-expanding annulation Ring-opening annulations Rings Robinson annulation reaction Steroids, ring annulation