“…Heterocyclic compounds have unique place in medicinal chemistry [ 15 , 16 ] and in the recent years identified as covalent and non-covalent against both M Pro and PL Pro enzymes [ [17] , [18] , [19] , [20] ]. Rational design and testing of heterocyclic compounds acting on different targets against SARS-CoV-2 has been recently reviewed in detail [ 21 ]. Quinoline, a fused heterocyclic compound is a privileged scaffold and a versatile pharmacophore, that is part of antibacterial, anti-tubercular, anticancer, antiviral and local anaesthetic drugs [ [22] , [23] , [24] ].…”