RESIDUE 0A6 21 CONECT O01 1 C02 CONECT C02 3 O01 C03 O10 CONECT C03 4 C02 O04 C05 H03 CONECT O04 2 C03 H04 CONECT C05 4 C03 C06 H051 H052 CONECT C06 3 C05 O07 OXT CONECT O07 1 C06 CONECT C08 4 C09 O10 H081 H082 CONECT C09 4 C08 H091 H092 H093 CONECT O10 2 C02 C08 CONECT OXT 2 C06 HOT CONECT H03 1 C03 CONECT H04 1 O04 CONECT H051 1 C05 CONECT H052 1 C05 CONECT HOT 1 OXT CONECT H081 1 C08 CONECT H082 1 C08 CONECT H091 1 C09 CONECT H092 1 C09 CONECT H093 1 C09 END HET 0A6 21 HETNAM 0A6 (3R)-4-ethoxy-3-hydroxy-4-oxobutanoic acid FORMUL 0A6 C6 H10 O5