RESIDUE 58I 20 CONECT N2 4 C4 HN21 HN22 H3 CONECT C4 4 N2 C3 H41 H42 CONECT C3 4 C4 C2 H31 H32 CONECT C2 4 C3 C1 H21 H22 CONECT C1 4 C2 N1 HN11 H1 CONECT N1 4 C1 H2 HN12 H14 CONECT HN21 1 N2 CONECT HN22 1 N2 CONECT H3 1 N2 CONECT H41 1 C4 CONECT H42 1 C4 CONECT H31 1 C3 CONECT H32 1 C3 CONECT H21 1 C2 CONECT H22 1 C2 CONECT HN11 1 C1 CONECT H1 1 C1 CONECT H2 1 N1 CONECT HN12 1 N1 CONECT H14 1 N1 END HET 58I 20 HETSYN 58I Butane-1,4-diyldiammonium; Putrescinium HETNAM 58I 4-azaniumylbutylazanium FORMUL 58I C4 H14 N2 2+