RESIDUE 2HE 14 CONECT O3 2 P HO3 CONECT P 4 O3 O1 O2 CA CONECT O1 1 P CONECT O2 2 P HO2 CONECT CA 4 P CB HA HAA CONECT CB 4 CA O4 HB HBA CONECT O4 2 CB HO4 CONECT HO3 1 O3 CONECT HO2 1 O2 CONECT HA 1 CA CONECT HAA 1 CA CONECT HB 1 CB CONECT HBA 1 CB CONECT HO4 1 O4 END HET 2HE 14 HETNAM 2HE (2-hydroxyethyl)phosphonic acid FORMUL 2HE C2 H7 O4 P1