data_2000830 _journal_name_full 'Acta Cryst.' _journal_year 1992 _journal_volume C48 _journal_page_first 1063 _journal_page_last 1065 loop_ _publ_author_name 'Lokaj, J.' 'Sivy, P.' 'Kettmann, V.' _chemical_formula_sum 'C10 H10 O4' _chemical_formula_weight 194.2 _symmetry_cell_setting monoclinic _symmetry_space_group_name_H-M 'P 21/c' _symmetry_space_group_name_Hall ? _cell_length_a 9.266(7) _cell_length_b 14.570(10) _cell_length_c 7.404(5) _cell_angle_alpha 90. _cell_angle_beta 108.60(6) _cell_angle_gamma 90. _cell_volume 947(2) _cell_formula_units_Z 4 _exptl_crystal_density_diffrn 1.362 _exptl_crystal_density_meas 1.350(10) _exptl_crystal_F_000 408 _exptl_absorpt_coefficient_mu 0.66 _diffrn_radiation_type Mo _diffrn_radiation_wavelength 0.71069 loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z C(1) .5289(3) .7181(2) .1762(4) C(2) .6513(3) .7813(2) .1958(4) C(3) .5964(3) .8646(2) .1846(3) C(4) .4362(2) .8599(2) .1576(3) C(5) .3339(2) .92410(10) .1464(3) C(6) .1730(2) .90860(10) .1217(3) C(7) .0790(3) .8632(2) -.0364(3) C(8) .1261(3) .8290(2) -.1970(4) C(9) .1112(3) .9429(2) .2575(3) C(10) .2054(3) .9955(2) .4234(4) O(1) .5240(2) .63650(10) .1813(3) O(2) .3977(2) .76810(10) .1506(2) O(3) -.0636(2) .84860(10) -.0538(2) O(4) -.0272(2) .92960(10) .2431(3) H(C2) .755(2) .7636(15) .213(3) H(C3) .640(3) .9223(16) .189(3) H(C5) .368(2) .9861(14) .158(3) H1(C8) .222(3) .8557(17) -.206(3) H2(C8) .053(3) .8352(17) -.311(3) H3(C8) .152(3) .7701(19) -.175(4) H1(C10) .145(3) 1.0173(16) .507(3) H2(C10) .283(3) .9620(17) .506(3) H3(C10) .258(3) 1.0468(17) .395(4) H(O3) -.082(3) .881(2) .070(4)