The procyanidin is primarily consisted of units with 2,3-cis configuration.
多聚原花青定的组成单元以2，3-顺式构型为主。
The double bonds are usually in the cis configuration, which introduce a sharp kink.
那些双键一般是顺式结构的，从而引进一个大幅度的扭转。
The results show that the title compound is stable; the cis configuration has intramolecular hydrogen bond while trans configuration dose not.
结果表明标题化合物稳定，顺式构型分子内有氢键，反式则没有。
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