loop_ _geom_bond.atom_site_id_1 _geom_bond.atom_site_id_2 _geom_bond.dist _geom_bond.site_symmetry_1 _geom_bond.site_symmetry_2 _geom_bond.publ_flag O1 C2 1.342(4) 1_555 1_555 yes O1 C5 1.439(3) 1_555 1_555 yes C2 C3 1.512(4) 1_555 1_555 yes C2 O21 1.199(4) 1_555 1_555 yes C3 N4 1.465(3) 1_555 1_555 yes C3 C31 1.537(4) 1_555 1_555 yes C3 H3 1.00(3) 1_555 1_555 ? N4 C5 1.472(3) 1_555 1_555 yes # - - - - data truncated for brevity - - - -