RESIDUE 5AC 15 CONECT NAA 3 CAG HNAA HNAB CONECT CAG 3 NAA OAC CAI CONECT OAC 1 CAG CONECT CAI 3 CAG CAH NAE CONECT CAH 3 CAI NAB NAF CONECT NAB 3 CAH HNAC HNAD CONECT NAF 3 CAH CAD HNAF CONECT CAD 3 NAF NAE HAD CONECT NAE 2 CAI CAD CONECT HNAA 1 NAA CONECT HNAB 1 NAA CONECT HNAC 1 NAB CONECT HNAD 1 NAB CONECT HNAF 1 NAF CONECT HAD 1 CAD END HET 5AC 15 HETNAM 5AC 5-amino-1H-imidazole-4-carboxamide FORMUL 5AC C4 H6 N4 O1