RESIDUE 5FX 19 CONECT C1 4 O1 C2 H11C H12C CONECT O1 2 C1 H1 CONECT C2 3 C1 O2 C3 CONECT O2 1 C2 CONECT C3 4 C2 O3 C4 H3 CONECT O3 2 C3 HA CONECT C4 4 C3 O4 C5 H4 CONECT O4 2 C4 HB CONECT C5 4 C4 F H51C H52C CONECT F 1 C5 CONECT H11C 1 C1 CONECT H12C 1 C1 CONECT H1 1 O1 CONECT H3 1 C3 CONECT HA 1 O3 CONECT H4 1 C4 CONECT HB 1 O4 CONECT H51C 1 C5 CONECT H52C 1 C5 END HET 5FX 19 HETNAM 5FX 5-deoxy-5-fluoro-D-xylulose FORMUL 5FX C5 H9 F1 O4