Crystal Data and Structure Refinement Details for (-)-Pseudosemiglabrin.

S  =  Goodness of fit, in general value of S should be close to 1.
wR2  =  Weighted Residual Factor is the most closely related to the refinement against squared structure factors. The weighting factor w is indivisually derived from the standard uncertanities of the measured reflections and expresses the confidence we have in every single reflection. This factor should be minimum during refinement
R  =  Unweighted residual factor. This factor should also be minimum during refinement.
Nref  =  Number of independent reflections
Npar  =  the number of refined parameters
Rint  =  The merging residual value, reflects the summations involve all the input reflections for which more than one symmetry equivalent are averaged.