A Metal-free Multicomponent {Strategy|Technique|Method|Approach|Tactic} for Amidine Synthesis
Amidines are a ubiquitous class of bioactive compounds {found|discovered|identified|located} {in a|inside a|within a} wide {variety|selection|assortment|range|wide variety} of {natural|all-natural|organic} {products|goods|items|merchandise|solutions}; {thus|therefore|hence|as a result}, {efficient|effective} strate-gies for their preparation are in {great|fantastic|excellent|wonderful|good|terrific}…