RESIDUE HAD 14 CONECT C1 4 C2 N 1H1 2H1 CONECT C2 3 C1 O1 O2 CONECT O1 1 C2 CONECT O2 2 C2 HO2 CONECT N 3 C1 C OH CONECT OH 2 N HO CONECT C 3 N O OXT CONECT O 1 C CONECT OXT 2 C HXT CONECT 1H1 1 C1 CONECT 2H1 1 C1 CONECT HO2 1 O2 CONECT HO 1 OH CONECT HXT 1 OXT END HET HAD 14 HETNAM HAD (CARBOXYHYDROXYAMINO)ETHANOIC ACID FORMUL HAD C3 H5 N1 O5