RESIDUE 3GU 45 CONECT C1 4 N6 C21 C24 H1 CONECT N1 2 C2 C6 CONECT C2 3 N1 N3 H2 CONECT N3 2 C2 C4 CONECT C4 3 N3 C5 N9 CONECT C5 3 C4 C6 N7 CONECT C6 3 N1 C5 N6 CONECT N6 3 C1 C6 HN6 CONECT N7 2 C5 C8 CONECT C8 3 N7 N9 H8 CONECT N9 3 C4 C8 C1' CONECT C1' 4 N9 C2' O4' H1' CONECT C2' 4 C1' O2' C3' H2' CONECT O2' 2 C2' HO2' CONECT C21 4 C1 C22 H21 H21A CONECT C22 4 C21 C23 H22 H22A CONECT C23 4 C22 C24 H23 H23A CONECT C24 4 C1 C23 H24 H24A CONECT C3' 4 C2' O3' C4' H3' CONECT O3' 2 C3' HO3' CONECT C4' 4 C3' O4' C5' H4' CONECT O4' 2 C1' C4' CONECT C5' 4 C4' O5' H5' H5'A CONECT O5' 2 C5' HO5' CONECT H1 1 C1 CONECT H2 1 C2 CONECT HN6 1 N6 CONECT H8 1 C8 CONECT H1' 1 C1' CONECT H2' 1 C2' CONECT HO2' 1 O2' CONECT H21 1 C21 CONECT H21A 1 C21 CONECT H22 1 C22 CONECT H22A 1 C22 CONECT H23 1 C23 CONECT H23A 1 C23 CONECT H24 1 C24 CONECT H24A 1 C24 CONECT H3' 1 C3' CONECT HO3' 1 O3' CONECT H4' 1 C4' CONECT H5' 1 C5' CONECT H5'A 1 C5' CONECT HO5' 1 O5' END HET 3GU 45 HETNAM 3GU N6-cyclopentyladenosine FORMUL 3GU C15 H21 N5 O4