AUTHOR=Moni Lisa , De Moliner Fabio , Garbarino Silvia , Saupe Jörn , Mang Christian , Basso Andrea TITLE=Corrigendum: Exploitation of the Ugi 5-Center-4-Component Reaction (U-5C-4CR) for the Generation of Diverse Libraries of Polycyclic (Spiro)Compounds JOURNAL=Frontiers in Chemistry VOLUME=6 YEAR=2018 URL=https://www.frontiersin.org/journals/chemistry/articles/10.3389/fchem.2018.00510 DOI=10.3389/fchem.2018.00510 ISSN=2296-2646