RESIDUE 41K 21 CONECT OAA 2 CAE H1 CONECT CAE 3 OAA OAD CAF CONECT OAD 1 CAE CONECT CAF 4 CAE CAB N SAK CONECT CAB 4 CAF H2 H3 H4 CONECT N 3 CAF CA H5 CONECT SAK 2 CAF CB CONECT CB 4 SAK CA H7 H8 CONECT CA 4 N CB C H9 CONECT C 3 CA O OXT CONECT O 1 C CONECT OXT 2 C H10 CONECT H1 1 OAA CONECT H2 1 CAB CONECT H3 1 CAB CONECT H4 1 CAB CONECT H5 1 N CONECT H7 1 CB CONECT H8 1 CB CONECT H9 1 CA CONECT H10 1 OXT END HET 41K 21 HETNAM 41K (2R,4R)-2-methyl-1,3-thiazolidine-2,4-dicarboxylic acid FORMUL 41K C6 H9 N1 O4 S1