RESIDUE 7A3 22 CONECT O2 2 C2 H3 CONECT O3 2 C3 H4 CONECT C1 4 C2 C H1 H2 CONECT O1 1 C CONECT C2 4 O2 C1 C3 C4 CONECT C5 3 C4 O6 O7 CONECT C3 3 O3 C2 O4 CONECT C4 4 C2 C5 O5 H5 CONECT C 3 C1 O1 O CONECT O 2 C H7 CONECT O4 1 C3 CONECT O5 2 C4 H6 CONECT O6 1 C5 CONECT O7 2 C5 H8 CONECT H3 1 O2 CONECT H4 1 O3 CONECT H1 1 C1 CONECT H2 1 C1 CONECT H5 1 C4 CONECT H7 1 O CONECT H6 1 O5 CONECT H8 1 O7 END HET 7A3 22 HETNAM 7A3 3-C-carboxy-2-deoxy-D-erythro-pentaric acid FORMUL 7A3 C6 H8 O8