RESIDUE 4HS 12 CONECT C1 3 N C H1 CONECT C2 3 C3 O N CONECT C3 3 C2 C4 H2 CONECT C4 3 C3 C H4 CONECT O 1 C2 CONECT N 3 C1 C2 H3 CONECT C 3 C1 C4 BR CONECT BR 1 C CONECT H1 1 C1 CONECT H2 1 C3 CONECT H4 1 C4 CONECT H3 1 N END HET 4HS 12 HETNAM 4HS 5-bromopyridin-2(1H)-one FORMUL 4HS C5 H4 Br1 N1 O1