RESIDUE 44W 22 CONECT N01 3 C02 H1 H2 CONECT C02 3 N01 N03 N23 CONECT N03 2 C02 C04 CONECT C04 3 N03 N05 C20 CONECT N05 3 C04 C06 H3 CONECT C06 4 N05 C07 H4 H5 CONECT C07 3 C06 C08 N19 CONECT C08 4 C07 H6 H7 H8 CONECT N19 2 C07 C20 CONECT C20 3 C04 N19 C21 CONECT C21 3 C20 O22 N23 CONECT O22 1 C21 CONECT N23 3 C02 C21 H9 CONECT H1 1 N01 CONECT H2 1 N01 CONECT H3 1 N05 CONECT H4 1 C06 CONECT H5 1 C06 CONECT H6 1 C08 CONECT H7 1 C08 CONECT H8 1 C08 CONECT H9 1 N23 END HET 44W 22 HETNAM 44W 2-amino-6-methyl-7,8-dihydropteridin-4(3H)-one FORMUL 44W C7 H9 N5 O1