Acta Cryst. (2010). E66, o295  [ doi:10.1107/S1600536810000231 ]

6-Acetoxy-1,7,11,15-tetrahydroxy-7,20-epoxy-ent-kaur-16-ene

F.-L. Yan, P. Li, X.-M. Di, C. Feng and R.-J. Hou

Online 9 January 2010

Key indicators

• Single-crystal X-ray study
• T = 93 K
• Mean (C-C) = 0.002 Å
• R factor = 0.028
• wR factor = 0.064
• Data-to-parameter ratio = 8.6

checkCIF/PLATON results

No syntax errors found




Alert level C
PLAT910_ALERT_3_C Missing # of FCF Reflections Below Th(Min) .....          5      
PLAT911_ALERT_3_C Missing # FCF Refl Between THmin & STh/L=  0.600          2      
PLAT912_ALERT_4_C Missing # of FCF Reflections Above STh/L=  0.600          4      

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           27.48
           From the CIF: _reflns_number_total               2412
           Count of symmetry unique reflns         2423
           Completeness (_total/calc)             99.55%
           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
PLAT791_ALERT_4_G The Model has Chirality at C1      (Verify) ....          S      
PLAT791_ALERT_4_G The Model has Chirality at C5      (Verify) ....          R      
PLAT791_ALERT_4_G The Model has Chirality at C6      (Verify) ....          S      
PLAT791_ALERT_4_G The Model has Chirality at C7      (Verify) ....          S      
PLAT791_ALERT_4_G The Model has Chirality at C8      (Verify) ....          S      
PLAT791_ALERT_4_G The Model has Chirality at C9      (Verify) ....          S      
PLAT791_ALERT_4_G The Model has Chirality at C10     (Verify) ....          S      
PLAT791_ALERT_4_G The Model has Chirality at C11     (Verify) ....          S      
PLAT791_ALERT_4_G The Model has Chirality at C13     (Verify) ....          S      
PLAT791_ALERT_4_G The Model has Chirality at C15     (Verify) ....          R      

   0 ALERT level A = In general: serious problem
   0 ALERT level B = Potentially serious problem
   3 ALERT level C = Check and explain
  11 ALERT level G = General alerts; check

   0 ALERT type 1 CIF construction/syntax error, inconsistent or missing data
   0 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
  12 ALERT type 4 Improvement, methodology, query or suggestion
   0 ALERT type 5 Informative message, check

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