RESIDUE 19L 55 CONECT C 3 N N1 N2 CONECT N 3 C H1 H2 CONECT O 1 C1 CONECT C1 3 O N1 C2 CONECT N1 2 C C1 CONECT C2 3 C1 C3 N4 CONECT N2 3 C C3 H20 CONECT O1 1 C6 CONECT C3 3 C2 N2 N3 CONECT N3 2 C3 C4 CONECT C4 3 N3 C5 C6 CONECT N4 2 C2 C5 CONECT C5 3 C4 N4 H19 CONECT C6 3 O1 C4 N5 CONECT N5 3 C6 C7 H18 CONECT C7 4 N5 C9 C8 H14 CONECT C9 3 C7 O3 N6 CONECT O3 1 C9 CONECT C8 4 C7 O2 H15 H16 CONECT O2 2 C8 H17 CONECT N6 3 C9 C10 H13 CONECT C10 4 N6 C20 C11 H4 CONECT C20 3 C10 O4 O5 CONECT O4 1 C20 CONECT C11 4 C10 C12 H5 H6 CONECT C12 3 C11 C13 C15 CONECT C13 3 C12 N7 H12 CONECT C15 3 C12 C14 C16 CONECT N7 3 C13 C14 H11 CONECT C14 3 C15 N7 C19 CONECT C16 3 C15 C17 H7 CONECT C19 3 C14 C18 H10 CONECT C17 3 C16 C18 H8 CONECT C18 3 C19 C17 H9 CONECT O5 2 C20 H3 CONECT H1 1 N CONECT H2 1 N CONECT H20 1 N2 CONECT H19 1 C5 CONECT H18 1 N5 CONECT H14 1 C7 CONECT H15 1 C8 CONECT H16 1 C8 CONECT H17 1 O2 CONECT H13 1 N6 CONECT H4 1 C10 CONECT H5 1 C11 CONECT H6 1 C11 CONECT H12 1 C13 CONECT H11 1 N7 CONECT H7 1 C16 CONECT H10 1 C19 CONECT H8 1 C17 CONECT H9 1 C18 CONECT H3 1 O5 END HET 19L 55 HETNAM 19L (2S)-2-[[(2S)-2-[(2-azanyl-4-oxidanylidene-1H-pteridin- HETNAM 2 19L 7-yl)carbonylamino]-3-oxidanyl-propanoyl]amino]-3-(1H-i HETNAM 3 19L ndol-3-yl)propanoic acid FORMUL 19L C21 H20 N8 O6