Department of Chemistry;
University of Delhi;
Delhi 110007;
India;
Dyal Singh College;
University of Delhi;
Lodhi Road;
Delhi 110003;
India;
Department of Dairy Microbiology;
College of Dairy Science and Technology;
Guru Angad Dev Veterinary and Animal Science University;
Ludhiana 141004;
India;
Multicomponent reactions; Isatin; Spirooxindole; Heterocycles; Antimicrobial activity;