SEARCH Articles Figures Tables Chiral C2-Symmetric Bronsted Bases Guanidines Chiral guanidine bases Guanidine base catalysts Guanidine nucleophilic base Guanidine organic base catalysis Guanidine-based catalysts Guanidine-based thiourea derivative Guanidine-thiourea-based catalyst Polymer supported guanidine base Solvent-Dependent Guanidine Base Catalyzed Mannich Reactions Thiourea guanidine-based