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Acta Cryst. (2013). E69, o1310  [ doi:10.1107/S1600536813019648 ]

Methyl 2-(2,2-dimethyl-3a,6a-dihydrofuro[3,2-d][1,3]dioxol-5-yl)-4-oxo-4H-chromene-3-carboxylate

Z. Fatima, T. Srinivasan, J. N. S. Rao, R. Raghunathan and D. Velmurugan


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Alert level B PLAT230_ALERT_2_B Hirshfeld Test Diff for C4 -- C5 .. 10.6 su
Alert level C PLAT242_ALERT_2_C Check Low Ueq as Compared to Neighbors for C16
Alert level G PLAT002_ALERT_2_G Number of Distance or Angle Restraints on AtSite 9 PLAT003_ALERT_2_G Number of Uiso or Uij Restrained non-H Atoms ... 8 PLAT005_ALERT_5_G No _iucr_refine_instructions_details in the CIF ? Do ! PLAT199_ALERT_1_G Check the Reported _cell_measurement_temperature 293 K PLAT200_ALERT_1_G Check the Reported _diffrn_ambient_temperature 293 K PLAT301_ALERT_3_G Note: Main Residue Disorder ................... 16 % PLAT779_ALERT_4_G Suspect or Irrelevant (Bond) Angle in CIF .... # 30 C10' -C9 -C10 1.555 1.555 1.555 11.90 Deg. PLAT791_ALERT_4_G Note: The Model has Chirality at C14 (Verify) R PLAT791_ALERT_4_G Note: The Model has Chirality at C15 (Verify) R PLAT811_ALERT_5_G No ADDSYM Analysis: Too Many Excluded Atoms .... ! Info PLAT860_ALERT_3_G Note: Number of Least-Squares Restraints ....... 99 PLAT912_ALERT_4_G Missing # of FCF Reflections Above STh/L= 0.600 5
0 ALERT level A = Most likely a serious problem - resolve or explain 1 ALERT level B = A potentially serious problem, consider carefully 1 ALERT level C = Check. Ensure it is not caused by an omission or oversight 12 ALERT level G = General information/check it is not something unexpected 2 ALERT type 1 CIF construction/syntax error, inconsistent or missing data 4 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 4 ALERT type 4 Improvement, methodology, query or suggestion 2 ALERT type 5 Informative message, check

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