As anticipated, the product formed high-quality crystals, enabling X-ray diffraction analysis. As shown in Figure , its X-ray structure reveals two co-existing diastereomers, each displaying two types of chirality: central chirality and staircase chirality. The two symmetrical phenyl rings exhibit asymmetric slippage; when the naphthyl anchor is positioned as shown in Figure , the top phenyl ring slips either to the right (Figure ) or to the left (Figure ). Since there is no established nomenclature for this new form of chirality, we propose a provisional naming system as follows: (1) Observe the "stairs" from the naphthyl anchor to the other end of the phenyl ring, which is attached to the auxiliaries. ( ) Imagine climbing the stairs from the bottom to the top.