RESIDUE 04J 52 CONECT C 3 N O C11 CONECT N 3 C CA HN CONECT O 1 C CONECT N1 2 C2 C8A CONECT O1 1 CT CONECT C2 3 N1 N3 NA2 CONECT O2 2 CT HO2 CONECT N3 2 C2 C4 CONECT C4 3 N3 C4A NA4 CONECT N5 2 C6 C4A CONECT C6 3 N5 C7 C9 CONECT C7 3 C6 N8 H7 CONECT N8 2 C7 C8A CONECT C9 4 C6 N10 H9 H9A CONECT CA 4 N CB CT HA CONECT CB 4 CA CG HB HBA CONECT CD 3 CG OE1 OE2 CONECT CG 4 CB CD HG HGA CONECT CT 3 O1 O2 CA CONECT N10 3 C9 C14 HN10 CONECT C11 3 C C12 C16 CONECT C12 3 C11 C13 H12 CONECT C13 3 C12 C14 H13 CONECT C14 3 N10 C13 C15 CONECT C15 3 C14 C16 H15 CONECT C16 3 C11 C15 H16 CONECT C4A 3 C4 N5 C8A CONECT C8A 3 N1 N8 C4A CONECT NA2 3 C2 HNA2 HNAA CONECT NA4 3 C4 HNA4 HNAB CONECT OE1 1 CD CONECT OE2 2 CD HOE2 CONECT HN 1 N CONECT HO2 1 O2 CONECT H7 1 C7 CONECT H9 1 C9 CONECT H9A 1 C9 CONECT HA 1 CA CONECT HB 1 CB CONECT HBA 1 CB CONECT HG 1 CG CONECT HGA 1 CG CONECT HN10 1 N10 CONECT H12 1 C12 CONECT H13 1 C13 CONECT H15 1 C15 CONECT H16 1 C16 CONECT HNA2 1 NA2 CONECT HNAA 1 NA2 CONECT HNA4 1 NA4 CONECT HNAB 1 NA4 CONECT HOE2 1 OE2 END HET 04J 52 HETSYN 04J N-(4-{[(2,4-diaminopteridin-6-yl)methyl]amino}benzoyl)- HETSYN 2 04J L-glutamic acid HETNAM 04J Aminopterin FORMUL 04J C19 H20 N8 O5