RESIDUE 33X 16 CONECT CM 4 N HM1 HM2 HM3 CONECT CA 4 CB C N HA CONECT CB 4 CA HB1 HB2 HB3 CONECT C 3 CA O OXT CONECT N 3 CM CA H CONECT O 1 C CONECT HM1 1 CM CONECT HM2 1 CM CONECT HM3 1 CM CONECT HA 1 CA CONECT HB1 1 CB CONECT HB2 1 CB CONECT HB3 1 CB CONECT H 1 N CONECT OXT 2 C HXT CONECT HXT 1 OXT END HET 33X 16 HETNAM 33X N-methyl-D-alanine FORMUL 33X C4 H9 N O2