RESIDUE 44A 31 CONECT N1 2 C2 C6 CONECT C2 3 N1 N3 H2 CONECT N3 2 C2 C4 CONECT C4 3 N3 C5 N9 CONECT C5 3 C4 C6 N7 CONECT C6 3 N1 C5 N6 CONECT N6 3 C6 HN6 HN6A CONECT N7 2 C5 C8 CONECT C8 3 N7 N9 H8 CONECT N9 3 C4 C8 CCN CONECT OAL 1 CCC CONECT OAN 2 CCK HOAN CONECT OAO 2 CCL HOAO CONECT OBV 2 CCM CCN CONECT CCC 3 OAL CCM O5 CONECT CCK 4 OAN CCL CCM HCK CONECT CCL 4 OAO CCK CCN HCL CONECT CCM 4 OBV CCC CCK HCM CONECT CCN 4 N9 OBV CCL HCN CONECT H2 1 C2 CONECT HN6 1 N6 CONECT HN6A 1 N6 CONECT H8 1 C8 CONECT HOAN 1 OAN CONECT HOAO 1 OAO CONECT O5 2 CCC H11 CONECT HCK 1 CCK CONECT HCL 1 CCL CONECT HCM 1 CCM CONECT HCN 1 CCN CONECT H11 1 O5 END HET 44A 31 HETNAM 44A 9-beta-D-ribofuranuronosyl-9H-purin-6-amine FORMUL 44A C10 H11 N5 O5