RESIDUE 3AY 16 CONECT NAA 3 C6 HAA1 HAA2 CONECT C6 3 NAA C5 N1 CONECT C5 3 C6 C4 H5 CONECT N1 2 C6 C2 CONECT C2 3 N1 NAH N3 CONECT NAH 3 C2 HAH1 HAH2 CONECT N3 2 C2 C4 CONECT C4 3 C5 N3 NAI CONECT NAI 3 C4 HAI1 HAI2 CONECT HAA1 1 NAA CONECT HAA2 1 NAA CONECT H5 1 C5 CONECT HAH1 1 NAH CONECT HAH2 1 NAH CONECT HAI1 1 NAI CONECT HAI2 1 NAI END HET 3AY 16 HETNAM 3AY PYRIMIDINE-2,4,6-TRIAMINE FORMUL 3AY C4 H7 N5