O2N N SN H NN NN 1 HO H O H N H NS COOH 2 N O MeO N S NN OMe 3 Cl Cl O NN O NC SMe SS Ph N S 4 NC N S 5 Figure 1.. Biologically active isothiazole carbonitriles. IIssootthhiiaazzoolleess aarree fifivvee--mmeemmbbeerreeddhheteetreorocycyclcelsesthtahtaht ahvaevf...