loop_ _geom_angle.atom_site_id_1 _geom_angle.atom_site_id_2 _geom_angle.atom_site_id_3 _geom_angle.value _geom_angle.value_esd _geom_angle.site_symmetry_1 _geom_angle.site_symmetry_2 _geom_angle.site_symmetry_3 _geom_angle.publ_flag C2 O1 C5 111.6 0.2 1_555 1_555 1_555 yes O1 C2 C3 110.9 0.2 1_555 1_555 1_555 yes O1 C2 O21 122.2 0.3 1_555 1_555 1_555 yes C3 C2 O21 127.0 0.3 1_555 1_555 1_555 yes C2 C3 N4 101.3 0.2 1_555 1_555 1_555 yes C2 C3 C31 111.3 0.2 1_555 1_555 1_555 yes C2 C3 H3 107 1 1_555 1_555 1_555 no N4 C3 C31 116.7 0.2 1_555 1_555 1_555 yes # - - - - data truncated for brevity - - - -