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.S 为拟合优度（Goodness of fit），一般情况下其取值应趋近于1。 wR2 为加权残差因子（Weighted Residual Factor），与基于平方结构因子的精修过程关联最为紧密。其中加权因子w由各实测衍射反射的标准不确定度单独推导得出，用于表征我们对单条衍射数据的置信程度，该因子在精修过程中应取最小值。 R 为非加权残差因子（Unweighted residual factor），同样需在精修过程中取得最小值。 Nref 为独立衍射反射的数量。 Npar 为待精修参数的数量。 Rint 为合并残差值（merging residual value），其反映了对存在多个对称等价衍射反射的全部输入衍射数据进行平均求和的过程。