RESIDUE 0PA 21 CONECT O2 1 C1 CONECT C1 3 O2 O1 C2 CONECT O1 2 C1 HO1 CONECT C2 4 C1 C3 H2 H2A CONECT C3 4 C2 C4 C7 H3 CONECT C4 4 C3 C5 H4 H4A CONECT C5 4 C4 C6 H5 H5A CONECT C6 4 C5 C7 H6 H6A CONECT C7 4 C3 C6 H7 H7A CONECT HO1 1 O1 CONECT H2 1 C2 CONECT H2A 1 C2 CONECT H3 1 C3 CONECT H4 1 C4 CONECT H4A 1 C4 CONECT H5 1 C5 CONECT H5A 1 C5 CONECT H6 1 C6 CONECT H6A 1 C6 CONECT H7 1 C7 CONECT H7A 1 C7 END HET 0PA 21 HETNAM 0PA cyclopentylacetic acid FORMUL 0PA C7 H12 O2