RESIDUE 3BY 20 CONECT O 1 C CONECT C 3 O OXT CA CONECT OXT 2 C HXT CONECT CA 4 C CB N HA CONECT CB 4 CA CG HB3 HB2 CONECT CG 4 CB CD HG3 HG2 CONECT CD 4 CG N HD3 HD2 CONECT N 3 CA CD CN CONECT CN 4 N HN1 HN2 HN3 CONECT HXT 1 OXT CONECT HA 1 CA CONECT HB3 1 CB CONECT HB2 1 CB CONECT HG3 1 CG CONECT HG2 1 CG CONECT HD3 1 CD CONECT HD2 1 CD CONECT HN1 1 CN CONECT HN2 1 CN CONECT HN3 1 CN END HET 3BY 20 HETNAM 3BY 1-methyl-L-proline FORMUL 3BY C6 H11 N O2