RESIDUE 0AB 18 CONECT N 3 CA HN1 HA2 CONECT CA 4 N C CB HB CONECT C 3 CA O O1 CONECT O 1 C CONECT CB 4 CA CG1 CG2 HA CONECT CG1 4 CB HG11 HG12 HG13 CONECT CG2 3 CB C1 HG2 CONECT O1 2 C C1 CONECT C1 3 CG2 O1 H1 CONECT HN1 1 N CONECT HA2 1 N CONECT HB 1 CA CONECT HA 1 CB CONECT HG11 1 CG1 CONECT HG12 1 CG1 CONECT HG13 1 CG1 CONECT HG2 1 CG2 CONECT H1 1 C1 END HET 0AB 18 HETNAM 0AB (3S,4S)-3-amino-4-methyl-3,4-dihydro-2H-pyran-2-one FORMUL 0AB C6 H9 N1 O2