Abstract New N-methyl and N-ethyl substitutions in the indazole nucleus are reported by reacting 3-(2-aminobenzamido) indazole and the appropriate trimethyl/triethyl orthobenzoate. Single crystal X-ray analysis confirms the N-ethylation position for the 3-(1- ethyl-1H-indazol-3-yl)-2-phenylquinazolin-4 (3H)-one derivative 3f. Compounds 11a-d and 3a-d were tested to evaluate their antimicrobial, antiproliferative and COX inhibitory ...