Citation:Che C, Li S, Jiang X, Quan J, Lin S, Yang Z. One-pot syntheses of chromeno[3,4- c ]pyrrole-3,4-diones via Ugi-4CR and intramolecular Michael addition. Organic Letters [Internet]. 2010;(20):4682-4685.ExportDOI BibTex EndNote Tagged EndNote XML Website DOI