loop_ _geom_angle.atom_site_id_1 _geom_angle.atom_site_id_2 _geom_angle.atom_site_id_3 _geom_angle.value _geom_angle.site_symmetry_1 _geom_angle.site_symmetry_2 _geom_angle.site_symmetry_3 _geom_angle.publ_flag C2 O1 C5 111.6(2) 1_555 1_555 1_555 yes O1 C2 C3 110.9(2) 1_555 1_555 1_555 yes O1 C2 O21 122.2(3) 1_555 1_555 1_555 yes C3 C2 O21 127.0(3) 1_555 1_555 1_555 yes C2 C3 N4 101.3(2) 1_555 1_555 1_555 yes C2 C3 C31 111.3(2) 1_555 1_555 1_555 yes C2 C3 H3 107(1) 1_555 1_555 1_555 ? N4 C3 C31 116.7(2) 1_555 1_555 1_555 yes # - - - - data truncated for brevity - - - -