RESIDUE TRI 8 CONECT N1 2 N2 C5 CONECT N2 2 N1 C3 CONECT C3 3 N2 N4 H3 CONECT N4 3 C3 C5 HN4 CONECT C5 3 N1 N4 H5 CONECT H3 1 C3 CONECT HN4 1 N4 CONECT H5 1 C5 END HET TRI 8 HETNAM TRI 1,2,4-TRIAZOLE FORMUL TRI C2 H3 N3