RESIDUE 4AP 14 CONECT N1 3 C2 C6 HN1 CONECT C2 3 N1 C3 H2 CONECT C3 3 C2 C4 H3 CONECT C4 3 C3 C5 N4 CONECT C5 3 C4 C6 H5 CONECT C6 3 N1 C5 H6 CONECT N4 3 C4 HN41 HN42 CONECT HN1 1 N1 CONECT H2 1 C2 CONECT H3 1 C3 CONECT H5 1 C5 CONECT H6 1 C6 CONECT HN41 1 N4 CONECT HN42 1 N4 END HET 4AP 14 HETNAM 4AP 4-AMINOPYRIDINE FORMUL 4AP C5 H7 N2 1+