RESIDUE 31Y 54 CONECT C2 3 N C1 C4 CONECT C3 3 N1 N H1 CONECT N4 2 C9 C10 CONECT C5 3 C6 C4 H2 CONECT N6 3 C22 C19 C16 CONECT C7 4 N3 C8 H3 H4 CONECT C9 3 N4 C8 H5 CONECT C10 3 N4 C11 H6 CONECT C11 3 C10 C12 H7 CONECT C12 3 C11 C8 H8 CONECT C13 3 C18 C14 N5 CONECT C15 3 C16 C14 H9 CONECT C18 3 C13 C17 H10 CONECT C20 4 O C19 H11 H12 CONECT C21 4 C22 O H13 H14 CONECT C22 4 N6 C21 H15 H16 CONECT O 2 C20 C21 CONECT C19 4 N6 C20 H17 H18 CONECT C16 3 N6 C15 C17 CONECT C14 3 C13 C15 H19 CONECT C17 3 C18 C16 H20 CONECT N5 3 C13 C H21 CONECT C 3 N5 N1 C1 CONECT N1 2 C3 C CONECT N 2 C2 C3 CONECT C1 3 C2 C N2 CONECT N2 2 C1 C6 CONECT C6 3 C5 N2 N3 CONECT C4 3 C2 C5 H22 CONECT N3 3 C7 C6 H23 CONECT C8 3 C7 C9 C12 CONECT H1 1 C3 CONECT H2 1 C5 CONECT H3 1 C7 CONECT H4 1 C7 CONECT H5 1 C9 CONECT H6 1 C10 CONECT H7 1 C11 CONECT H8 1 C12 CONECT H9 1 C15 CONECT H10 1 C18 CONECT H11 1 C20 CONECT H12 1 C20 CONECT H13 1 C21 CONECT H14 1 C21 CONECT H15 1 C22 CONECT H16 1 C22 CONECT H17 1 C19 CONECT H18 1 C19 CONECT H19 1 C14 CONECT H20 1 C17 CONECT H21 1 N5 CONECT H22 1 C4 CONECT H23 1 N3 END HET 31Y 54 HETNAM 31Y N~4~-[4-(morpholin-4-yl)phenyl]-N~6~-(pyridin-3-ylmethy HETNAM 2 31Y l)pyrido[3,2-d]pyrimidine-4,6-diamine FORMUL 31Y C23 H23 N7 O1