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Acta Cryst. (2006). E62, o1428-o1430  [ doi:10.1107/S1600536806008944 ]

14-Acetyl-20-ethyl-1,8-dihydroxy-16,18-dimethoxylycoctonine

M. Ahmad, S. Ali, F. Shaheen, S. Anjum and M. I. Choudhary

Online 15 March 2006


Key indicators

checkCIF/PLATON results

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Alert level C STRVA01_ALERT_4_C Flack test results are meaningless. From the CIF: _refine_ls_abs_structure_Flack 0.000 From the CIF: _refine_ls_abs_structure_Flack_su 10.000 PLAT032_ALERT_4_C Std. Uncertainty in Flack Parameter too High ... 10.00 PLAT066_ALERT_1_C Predicted and Reported Transmissions Identical . ? PLAT089_ALERT_3_C Poor Data / Parameter Ratio (Zmax .LT. 18) ..... 7.25 PLAT125_ALERT_4_C No _symmetry_space_group_name_Hall Given ....... ? PLAT199_ALERT_1_C Check the Reported _cell_measurement_temperature 293 K PLAT200_ALERT_1_C Check the Reported _diffrn_ambient_temperature . 293 K PLAT220_ALERT_2_C Large Non-Solvent C Ueq(max)/Ueq(min) ... 2.53 Ratio PLAT222_ALERT_3_C Large Non-Solvent H Ueq(max)/Ueq(min) ... 3.17 Ratio PLAT720_ALERT_4_C Number of Unusual/Non-Standard Label(s) ........ 2 PLAT790_ALERT_4_C Centre of Gravity not Within Unit Cell: Resd. # 1 C25 H39 N O6 PLAT850_ALERT_2_C Check Flack Parameter Exact Value 0.00 and su .. 10.00
Alert level G REFLT03_ALERT_4_G Please check that the estimate of the number of Friedel pairs is correct. If it is not, please give the correct count in the _publ_section_exptl_refinement section of the submitted CIF. From the CIF: _diffrn_reflns_theta_max 25.00 From the CIF: _reflns_number_total 2152 Count of symmetry unique reflns 2161 Completeness (_total/calc) 99.58% TEST3: Check Friedels for noncentro structure Estimate of Friedel pairs measured 0 Fraction of Friedel pairs measured 0.000 Are heavy atom types Z>Si present no
0 ALERT level A = In general: serious problem 0 ALERT level B = Potentially serious problem 12 ALERT level C = Check and explain 1 ALERT level G = General alerts; check 3 ALERT type 1 CIF construction/syntax error, inconsistent or missing data 2 ALERT type 2 Indicator that the structure model may be wrong or deficient 2 ALERT type 3 Indicator that the structure quality may be low 6 ALERT type 4 Improvement, methodology, query or suggestion

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