About author: Ramesh Dhani Dept. of Pharmaceutical Chemistry JNTUA-OTRI, India E-mail: [email protected] ABSTRACT: Introduction of D-amino acids and N-methylation of amino acids like tyrosine, valine, alanine etc enhanced antimicrobial activity. Condensation of heterocyclic moieties viz nicotinic acid, thiazole, coumarin, quinoline, furan, imidazole etc. with amino acids and peptides resulted in compounds with potent biological activities. Many of the heterocyclic found ... Read More »