loop_ _geom_bond.atom_site_id_1 _geom_bond.atom_site_id_2 _geom_bond.dist _geom_bond.dist_esd _geom_bond.site_symmetry_1 _geom_bond.site_symmetry_2 _geom_bond.publ_flag O1 C2 1.342 0.004 1_555 1_555 yes O1 C5 1.439 0.003 1_555 1_555 yes C2 C3 1.512 0.004 1_555 1_555 yes C2 O21 1.199 0.004 1_555 1_555 yes C3 N4 1.465 0.003 1_555 1_555 yes C3 C31 1.537 0.004 1_555 1_555 yes C3 H3 1.00 0.03 1_555 1_555 no N4 C5 1.472 0.003 1_555 1_555 yes # - - - - data truncated for brevity - - - -