RESIDUE 26D 15 CONECT N1 3 C3 HN11 HN12 CONECT C3 3 N1 N3 C5 CONECT N3 2 C3 C2 CONECT C5 3 C3 C6 H5 CONECT C6 3 C5 C4 H6 CONECT C4 3 C6 C2 H4 CONECT C2 3 N3 C4 N2 CONECT N2 3 C2 HN21 HN22 CONECT HN11 1 N1 CONECT HN12 1 N1 CONECT H5 1 C5 CONECT H6 1 C6 CONECT H4 1 C4 CONECT HN21 1 N2 CONECT HN22 1 N2 END HET 26D 15 HETNAM 26D PYRIDINE-2,6-DIAMINE FORMUL 26D C5 H7 N3