RESIDUE 0GY 20 CONECT C2 3 C3 O2 O1 CONECT C3 3 C2 C4 H1 CONECT C4 3 C3 C5 C4A CONECT C5 3 C4 C6 H2 CONECT C6 3 C5 C6A O6 CONECT O6B 2 C6A H3 CONECT C6A 3 C6 O6B O6A CONECT O6A 1 C6A CONECT O6 2 C6 H4 CONECT C4A 3 C4 O4A O4B CONECT O4A 2 C4A H5 CONECT O4B 1 C4A CONECT O2 2 C2 H6 CONECT O1 1 C2 CONECT H1 1 C3 CONECT H2 1 C5 CONECT H3 1 O6B CONECT H4 1 O6 CONECT H5 1 O4A CONECT H6 1 O2 END HET 0GY 20 HETNAM 0GY (1E,3Z)-4-hydroxybuta-1,3-diene-1,2,4-tricarboxylic aci HETNAM 2 0GY d FORMUL 0GY C7 H6 O7