RESIDUE 4AC 40 CONECT OP3 2 P HOP3 CONECT P 4 OP3 OP1 OP2 O5' CONECT OP1 1 P CONECT OP2 2 P HOP2 CONECT O5' 2 P C5' CONECT C5' 4 O5' C4' H5' H5'' CONECT C4' 4 C5' O4' C3' H4' CONECT O4' 2 C4' C1' CONECT C3' 4 C4' O3' C2' H3' CONECT O3' 2 C3' HO3' CONECT C2' 4 C3' O2' C1' H2' CONECT O2' 2 C2' HO2' CONECT C1' 4 O4' C2' N1 H1' CONECT N1 3 C1' C2 C6 CONECT C2 3 N1 O2 N3 CONECT O2 1 C2 CONECT N3 2 C2 C4 CONECT C4 3 N3 N4 C5 CONECT N4 3 C4 C7 H4 CONECT C5 3 C4 C6 H5 CONECT C6 3 N1 C5 H6 CONECT C7 3 N4 O7 CM7 CONECT O7 1 C7 CONECT CM7 4 C7 HM71 HM72 HM73 CONECT HOP3 1 OP3 CONECT HOP2 1 OP2 CONECT H5' 1 C5' CONECT H5'' 1 C5' CONECT H4' 1 C4' CONECT H3' 1 C3' CONECT HO3' 1 O3' CONECT H2' 1 C2' CONECT HO2' 1 O2' CONECT H1' 1 C1' CONECT H4 1 N4 CONECT H5 1 C5 CONECT H6 1 C6 CONECT HM71 1 CM7 CONECT HM72 1 CM7 CONECT HM73 1 CM7 END HET 4AC 40 HETNAM 4AC N(4)-ACETYLCYTIDINE-5'-MONOPHOSPHATE FORMUL 4AC C11 H16 N3 O9 P1