RESIDUE ADE 15 CONECT N9 2 C8 C4 CONECT C8 3 N9 N7 H8 CONECT N7 2 C8 C5 CONECT C5 3 N7 C6 C4 CONECT C6 3 C5 N1 N6 CONECT N6 3 C6 1HN6 2HN6 CONECT N1 3 C6 C2 HN1 CONECT C2 3 N1 N3 H2 CONECT N3 2 C2 C4 CONECT C4 3 N9 C5 N3 CONECT H8 1 C8 CONECT 1HN6 1 N6 CONECT 2HN6 1 N6 CONECT HN1 1 N1 CONECT H2 1 C2 END HET ADE 15 HETNAM ADE ADENINE FORMUL ADE C5 H5 N5