RESIDUE 3WA 18 CONECT C1 3 C2 C3 C4 CONECT C2 3 C1 N6 N5 CONECT C3 3 C1 C7 O8 CONECT N6 2 C2 C12 CONECT C7 3 C3 C11 H1 CONECT C11 3 C7 N5 H2 CONECT C12 3 N6 N9 H3 CONECT C4 3 C1 N9 N10 CONECT N5 3 C2 C11 H4 CONECT O8 1 C3 CONECT N9 2 C12 C4 CONECT N10 3 C4 H5 H6 CONECT H1 1 C7 CONECT H2 1 C11 CONECT H3 1 C12 CONECT H4 1 N5 CONECT H5 1 N10 CONECT H6 1 N10 END HET 3WA 18 HETNAM 3WA 4-aminopyrido[2,3-d]pyrimidin-5(8H)-one FORMUL 3WA C7 H6 N4 O1